Academic literature on the topic 'Rudista'
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Journal articles on the topic "Rudista"
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Alencáster Ybarra, Gloria. "Nueva Rudista (Bivalva-Hippuritacea) del Cretácico Inferior del Municipio de Pihuamo, Jalisco." Boletín de la Sociedad Geológica Mexicana 47, no. 1 (1986): 47–61. http://dx.doi.org/10.18268/bsgm1986v47n1a4.
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Skelton, Peter W., Eulàlia Gili, and Jean-Pierre Masse. "Rudists as successful sediment-dwellers, not reef-builders, on Cretaceous carbonate platforms." Paleontological Society Special Publications 6 (1992): 271. http://dx.doi.org/10.1017/s2475262200008315.
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The claim that rudist bivalves competitively displaced corals from reef frameworks in the Cretaceous combines two assertions: (1) that rudist formations commonly developed as reefs; and (2) that the autecology of rudists was convergent with that of hermatypic corals. We dispute both assertions, and thus reject the hypothesis of competitive displacement. We argue instead that mobile sediments, rather than frameworks, dominated the margins of most of the extensive carbonate platforms of the period, and that it was on these non-reefal biotopes that the rudists flourished.Definitions of reefs tend to combine two major elements: (1) a robust biogenic framework (with accompanying sedimentary and diagenetic components); and (2) topographical relief. Such definitions are clearly rooted in Recent coral reefs, in which endosymbiotic zooxanthellae permit the extensive growth of colonial coral frameworks in shallow but relatively nutrient-poor waters and topography is largely the legacy of Pleistocene changes in sea-level. In rudist formations, in contrast, individual rudist aggregations are volumetrically limited, relative to sediment, often loosely constructed, and evidently showed little relief. Tabular and small lenticular units predominate.Differences in structure and palaeoenvironmental situation between rudist and coralgal associations are the effect of the different autecologies of the constituent organisms. While the clonal growth of corals predisposed them to framework development, the aclonal development of rudists was better suited to the opportunistic occupation of a variety of temporarily available substrata. Moreover, the tolerances and growth responses of rudists to such factors as water turbidity, nutrients and current regime were quite different from those of hermatypic corals. Despite repeated assertions in the literature that rudists possessed zooxanthellae, only a few species show any evidence for such a symbiosis and other evidence suggests that most lacked them.Rudist/coral competition is therefore doubtful, even though members of both groups co-occur in many areas. The relative demise and migration into deeper water of coral frameworks in the Cretaceous was thus probably independently caused.
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Scott, Robert W., Xiaqiao Wan, Jingeng Sha, and Shi-Xuan Wen. "Rudists of Tibet and the Tarim Basin, China: Significance to Requieniidae phylogeny." Journal of Paleontology 84, no. 3 (May 2010): 444–65. http://dx.doi.org/10.1666/09-137.1.
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Rudists are a principal biotic component of Cretaceous carbonates in Tibet and in the Western Tarim Basin. Barremian to Maastrichtian carbonate units are widespread on the northern margin of the Indian Plate and in Tethyan tectonic slices that were welded onto Eurasia in successive stages during the Late Cretaceous and Paleogene. In far northwestern Tibet, Barremian-Cenomanian endemic rudists and cosmopolitan orbitolinid foraminifera occupied isolated carbonate platforms in the eastern Tethys. Rudists, corals, and stromatoporoids composed bioherms up to 10 m thick and several kilometers in lateral extent. A unique endemic requieniid rudist,Rutonia, is compared to morphologically similar but older, less derived genera. Associated specimens in this assemblage are indeterminate requieniid valves, monopleurids, and two genera with three radiolitid species that are re-described and taxonomic positions re-evaluated. In southern Tibet, mainly endemic Campanian-Maastrichtian radiolitid rudists and cosmopolitan larger benthic foraminifera contributed to carbonate shelves on the northern Indian Plate near the Cretaceous equator. In the Western Tarim Basin Cenomanian strata yield Tethyan rudist species.Coiling morphometric analysis using the three-dimensional morphology Raup diagram shows that Requieniidae valves in contact with the substrate are convergent with the basic gastropod shell. More derived strongly coiled, younger requieniids were adapted to encrusting or semi-infaunal habits. Stratigraphic analysis confirms that Requieniidae diversity crises coincided with Cretaceous oceanic anoxic eventsTwo end members of valve geometry each appear to be primitive and derived characters respectively and separate the family Requieniidae into two clades that are here recognized as two new subfamilies. The end members are defined by the coiling geometry, whether the spire is close to the plane of commissure or it is translated along the coiling axis and by myophore structures. The older matheroniform clade has a low spirogyrate LV that is translated slightly from the commissure along the coiling axis; this group is composed ofMatheronia(and its subgenusMonnieria),Hypelasma, Lovetchenia, Rutonia, andKugleria.Genera in the younger clade have a tall trochospiral LV that is translated along the coiling axis and consists ofRequienia, Toucasia, Pseudotoucasia, Apricardia, Bayleoidea, andBayleia.Claditics support these relationships.
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Zambetakis - Lekkas, A., and A. Kemeridou. "LOFTUSIA CF. ANATOLICA HORIZON IN UPPER MAASTRICHTIAN LIMESTONES OF THE EASTERN GREECE PLATFORM (MOUNT PTOON, BOEOTIA, GREECE): PALAEOBIOGEOGRAPHICAL REMARKS." Bulletin of the Geological Society of Greece 36, no. 2 (July 23, 2018): 792. http://dx.doi.org/10.12681/bgsg.16818.
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Researches on upper Cretaceous limestones from the Eastern Greece platform in the area between Kokkinon and Akrefnion (Boeotia, Greece) revealed the presence of a horizon rich in Loftusia cf. anatolica (foraminifer). In this horizon, of late Maastrichtian age, L. cf. anatolica is associated with debris of Rudists, Orbitoides media, O. apiculata, O. gensacicus, Siderolites calcitrapoides, Omphalocyclus macroporus, Hellenocyclina beotica, Miliolidae, Dasycladaceae and echinoderms. It is found in an undisturbed sequence of limestones, where both the underlying and the overlying horizons are of the same facies and contain debris of Rudists, Hellenocyclina beotica, Orbitoides media, Siderolites calcitrapoides, Sulcoperculina sp., Rotaliidae, Mélobesiées,Nummofallotia sp., echinoderms. L. cf. anatolica is confined in the above mentioned horizon and it is found neither in the underlying nor in the overlying beds. This fades reflects an outer shelf environment in front of the rudist reefs. It is the first time that this species is reported in situ in Greece in an undisturbed stratigraphie sequence of upper Cretaceous limestones up to Paleocene flysch.
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Skelton, Peter W., José Manuel Castro, and Pedro Alejandro Ruiz-Ortiz. "Aptian carbonate platform development in the Southern Iberian Palaeomargin (Prebetic of Alicante, SE Spain)." BSGF - Earth Sciences Bulletin 190 (2019): 3. http://dx.doi.org/10.1051/bsgf/2019001.
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The Aptian stratigraphic record of the Alicante region consists of: a rudist and coral-rich carbonate platform of earliest Aptian age (Llopis Formation), with a discontinuous siliciclastic member at its top; followed by late Early, to Late Aptian hemipelagic marls and marlstones (Almadich Formation); and then by renewed carbonate platform development of Late Aptian to earliest Albian age (Seguilí Formation). In the Llopis Formation, SW-dipping, massive clinoform beds of bioclastic debris are succeeded by flat-lying platform-top beds. The latter show a cyclically regressive stacking of biofacies, with rudist-dominated floatstone in their lower parts passing upwards to finer-grained, more sparsely fossiliferous bed tops with burrow mottling. Caprinid rudists, with originally almost wholly aragonitic shells, dominate the external platform-top facies, while more internal facies contain a mix of monopleurid, polyconitid and requieniid rudists, all with relatively slightly thicker development of the calcitic outer shell layer, together with caprinids. Biostratigraphic and carbon-isotope data link the termination of the Llopis platform with the onset of OAE1a. The carbonate platform of the Seguilí Formation again contains tabular platform-top beds showing repeated cyclic regression, with dense rudist and/or chondrodont floatstones overlain by sparser floatstones with wackestone matrix and secondarily filled burrows. But caprinids are now absent, while requieniids and polyconitids, some of large size, as well as radiolitids, all with thickened calcitic outer shell layers, accompany the tubular monopleurid, Mathesia, together with a greater development of Chondrodonta biofacies. The same overall pattern of biotic turnover from the Early, to the Late Aptian is confirmed in other parts of Iberia and contiguous regions. Moreover, Iberian platforms of late Early Aptian age outside the present study area reveal a transitional phase with an increasing proportion of polyconitids in the outer platform-top to upper slope facies at the expense of caprinids. The siliciclastic influx at the top of the Llopis Formation implies a climatic shift from arid, to relatively more humid/pluvial conditions through the mid-Early Aptian, as seen in several other Iberian sections. This climatic change was probably forced by the intensified greenhouse conditions at the onset of OAE1a. By contrast with these Iberian platforms, caprinids continued to dominate the outer platform-top zones of some central to southern Tethyan platforms until the close of the Early Aptian. This broad palaeolatitudinal differentiation of rudist associations within the Tethyan belt implies a climatic influence, whether exerted through thermal modulation of seawater pH and/or aragonite saturation, variation in nutrient flux, or any combination of these.
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Jones, Douglas S., and David Nicol. "Origination, survivorship, and extinction of rudist taxa." Journal of Paleontology 60, no. 1 (January 1986): 107–15. http://dx.doi.org/10.1017/s0022336000021557.
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Rudists arose in the Late Jurassic and survived for nearly 100 m.y. before becoming extinct at the end of the Cretaceous. Over this interval they diversified gradually during the Late Jurassic and Early Cretaceous, rapidly in the mid-Cretaceous, then more slowly in the Late Cretaceous. Total rates of origination and extinction during the Late Jurassic and Early Cretaceous were uniform and comparable to those reported for other groups. The Late Cretaceous, however, was characterized by high and widely fluctuating total origination and extinction rates. Per taxon rates reveal a similar pattern except for high and variable rates in the Jurassic. The number of genera increased from the Oxfordian to a peak in the Cenomanian, decreased in the Turonian and Coniacian coinciding with a minor mass extinction event, and rose to a zenith in the Maastrichtian. Unlike other groups investigated, the rudists were at their highest level of diversity immediately prior to their disappearance.Rudist genera survived for a mean of 12 m.y., whereas families survived for a mean of 48 m.y. Survivorship curves for generic cohorts, based upon survival of all rudist genera that evolved during each stage, exhibit a concave shape when the effects of mass extinction and variance at low diversities are considered. Causal factors involved in the final disappearance of the rudists remain unclear; however, their tropical provinciality in the Late Cretaceous contributed to their vulnerability to mass extinction.
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HATTORI, KELLY E., CHARLES KERANS, and ROWAN C. MARTINDALE. "SEQUENCE STRATIGRAPHIC AND PALEOECOLOGIC ANALYSIS OF AN ALBIAN CORAL-RUDIST PATCH REEF, ARIZONA, USA." PALAIOS 34, no. 12 (December 17, 2019): 600–615. http://dx.doi.org/10.2110/palo.2019.052.
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ABSTRACT Fossilized reefs can preserve critical information about changes in marine environments over a relatively short period of time. The interpretation of these changes is often hindered by the complexity of reef growth with respect to architecture, biotic zonation, and time. High-resolution mapping and data collection incorporating both sequence stratigraphical and paleoecological principles are needed to document the architectural complexity of reef development. To demonstrate this, we present a case study in which both principles are integrated to build a new stratigraphic framework for an Albian-aged rudist-coral patch reef outcrop (Paul Spur, Bisbee, AZ, USA). The dataset reveals that the outcrop preserves five stages of development: (1) initial shoal deposition; (2) pioneer reef growth; (3) reef diversification; (4) reef hiatus; and (5) rudist shoal development. These stages represent periods of deposition and reef growth within high-frequency transgressive-regressive sequences. Interpretations of sedimentological and paleoecological data are then used to demonstrate the variable influence of different environmental controls on reef growth. Prevailing wind and current direction act as higher order controls on overall reef architecture by influencing windward-leeward asymmetry. Fluctuations in relative water depth as well as sedimentation rate, source, and type is an important influence on reef community and growth habit. Though corals and rudists cohabited during much of the reef's history, corals dominated when water depth was greater and external sediment influx lesser, whereas rudists dominated in shallow water depths and during periods of high external sediment influx. This work demonstrates that detailed evaluation of stratigraphy and paleoecology, as well as careful consideration of timelines and heterogeneity, is essential for building an accurate stratigraphic framework that allows a more thorough understanding of processes driving reef growth.
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Alencaster, Gloria, and Jerjes Pantoja-Alor. "The rudist Amphitriscoelus (Bivalvia-Hippuritacea) in the lower Cretaceous of southwestern Mexico." Journal of Paleontology 70, no. 3 (May 1996): 399–407. http://dx.doi.org/10.1017/s0022336000038336.
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The emended descriptions of the genus Amphitriscoelus and the species A. waringi Harris and Hodson are given, and a new species is proposed (A. pluriloculata). These rudist bivalves are derived from a thick Lower Cretaceous sequence of carbonate sediments interlayered with siliciclastic, volcaniclastic, and volcanic rocks in southwestern Mexico, near Huetamo, in the State of Michoacan. The species belong to a recently discovered rich fauna containing other rudists, nerineid gastropods, orbitolinid foraminifers, and calcareous algae. The fauna shows a close affinity with the Amphitriscoelus fauna of northern South America. Similar assemblages are also present in Texas, Cuba and other Mexican localities. The wide distribution of the fauna allows interpretation of paleogeographic relations among all the regions as well as interpretation of paleoecological similarities. The existence of an homogeneous large faunistic province during the Early Cretaceous is suggested.
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Hernández, Javier Ortega. "Rudists." Geology Today 27, no. 2 (March 2011): 74–77. http://dx.doi.org/10.1111/j.1365-2451.2011.00790.x.
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ΜΕΡΜΙΓΚΗ, Α., Α. ΜΑΡΚΟΠΟΥΛΟΥ - ΔΙΑΚΑΝΤΩΝΗ, and Α. ΖΑΜΠΕΤΑΚΗ - ΛΕΚΚΑ. "New paleontological and stratigraphical data on the upper - cretaceous transgression of the Pelagonian zone s.l. (Marmeiko, Ptoon Mt. NE Beotia)." Bulletin of the Geological Society of Greece 34, no. 2 (August 1, 2018): 585. http://dx.doi.org/10.12681/bgsg.17104.
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This paper concerns the study of a transgressive series, which overlies the upperjurassic oolitic limestones of subpelagonian zone, as well as the lateritic deposits, resulting from the alteration of the ophiolitic and fill the karstic cavities of the above mentioned limestones in NE Beotia (Fig.l). The purpose of this study is to• elucidate the age of the transgression, that occurred on the Jurassic limestones of the pelagonian platform at this region.• Discuss about the observed diachronism of the Late Cretaceous transgression on the Pelagonian platform.It is based on the study of micro- and macrofauna occurred in a section we describe in the "Marmeiko" area, on the Ptoon mountain. NOETH (1931) was the first who defined as Upper Turonian the age of the transgressive series, based on the study of Rudists. Later, BIGNOT & GUERNET (1968) studied the microfauna and attributed an age of lower Senonian. STEUBER (1993) based on the study of Hippuritidae, defined as Turonian and later (1995) as Turonian - Coniacian the age of the transgessive series. The basal part of the series consists of marls and marly limestones alternations. An abundant micro and macrofauna is found in this part of the section, as well as the first Rudist biostrome. In the middle part of the section 2 Rudist biostroms alternate with bioclastic limestones, containing abundant microfauna. In the upper part marls alternate with cherty limestones. The determinated micro- and macrofauna (Fig. 1), precises the age of the transgressive series as Santonian. This result confirms the diachronism of the transgressive phenomenon on the Pelagonian Upper- Jurassic limestones and the overthrusted ophiolites (AUBOUIN et al. 1960, BRUNN et al. 1972, KALLERGIS & ALBANTAKIS 1970, MAVRIDIS et al. 1979, NOETH 1931, BIGNOT & GUERNET 1968, CLEMENT & FERRIERE 1973, BIGNOT et al. 1973, STEUBER 1993, 1995, SKARPELIS & ZAMBETAKIS – LEKKAS 1998)
Dissertations / Theses on the topic "Rudista"
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Lucena, Santiago Gerard. "Revisión de la fauna de rudistas de les collades de basturs (Lleida, pirineos centro-meridionales)." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/285351.
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La localidad surpirenaica de les Collades de Basturs presenta afloramientos extensos y bien expuestos de rocas Santonienses que muestran una sucesión de margas neríticas y calizas someras, localmente con calcarenitas arenosas y que terminan con margas de profundidad. Los cambios laterales de facies son evidentes. Los requiénidos, monopleuridos, caprotínidos, radiolítidos, hippurítidos y plagioptychidos son abundantes en esta sucesión, pero se han notado importantes diferencias en la composición de las asociaciones de rudistas, incluso en la morfología de una sola especie, entre las diferentes facies.
Los radiolítidos, hippurítidos y plagioptychidos son los rudistas más abundantes y diversificados en la localidad, además de tener los caracteres morfológicos más complejos. Por esta razón, ellos merecían un profundo tratamiento de paleontología sistemática que incluyera una exhaustiva descripción de todas las características de su concha, su variabilidad intraespecífica y su revisión taxonómica.
Las siguientes especies han resultado bien caracterizadas: Radiolites angeiodes Lamarck, R. squamosus d´Orbigny, R. vallispetrosae Astre, Biradiolites acuticostatus (d´Orbigny), B. angulosissimus Toucas, B. beaussetensis Toucas, B. canaliculatus d´Orbigny, B. carezi Toucas, Bournonia excavata (d´Orbigny), Praeradiolites plicatus (Lajard, Négrel y Toulouzan), P. toucasi (d´Orbigny), y Sphaerulites caderensis (Toucas) entre los radiolítidos, Hippurites matheroni Douvillé, H. microstylus Douvillé, H. praecessor Douvillé, H. socialis Douvillé, H. sublaevis Matheron, Hippuritella maestrei (Vidal), H. toucasi (d´Orbigny), Vaccinites beaussetensis Toucas, V. galloprovincialis (Matheron), V. giganteus major Toucas, y V. zurcheri (Douvillé) entre los hippurítidos, y Plagioptychus aguilloni (d´Orbigny) y P. toucasi Matheron entre los plagioptychidos. Como consecuencia de este estudio sistemático, la taxonomía de los rudistas del Santoniense inferior pirenaico ha sido fuertemente simplificada y aclarada.
El registro y el análisis posterior de las apariciones de las especies de rudistas, y también las diferencias morfológicas en la concha de una misma especie en facies diferentes contribuye a entender la relación entre los parámetros paleoambientales y la composición faunística de las bioconstrucciones de rudistas en el Cretácico superior.The south Pyrenean locality Collades de Basturs provides extensive and well exposed outcrops of Santonian rocks displaying a succession of shelf marls and shallow-water limestones, with sandy calcarenites locally, and ending with deep-water marls. Lateral changes of facies are evident. Requienid, monopleurid, caprotinid, radiolitid, hippuritid and plagioptychid rudists are abundant there, but important differences are noticed on the composition of the rudist associations, and even the morphology of single species, among the different facies. Radiolitids, hippuritids and plagioptychids are the most abundant and diverse rudists in the locality, besides having the more complex morphological characters. For that reason, they deserved a deep systematic palaeontology treatment including an exhaustive description of all their shell characters and their intraspecific variability, and their taxonomic revision. The following species resulted well characterized: Radiolites angeiodes Lamarck, R. squamosus d´Orbigny, R. vallispetrosae Astre, Biradiolites acuticostatus (d´Orbigny), B. angulosissimus Toucas, B. beaussetensis Toucas, B. canaliculatus d´Orbigny, B. carezi Toucas, Bournonia excavata (d´Orbigny), Praeradiolites plicatus (Lajard, Négrel y Toulouzan), P. toucasi (d´Orbigny), and Sphaerulites caderensis (Toucas) among the radiolitids, Hippurites matheroni Douvillé, H. microstylus Douvillé, H. praecessor Douvillé, H. socialis Douvillé, H. sublaevis Matheron, Hippuritella maestrei (Vidal), H. toucasi (d´Orbigny), Vaccinites beaussetensis Toucas, V. galloprovincialis (Matheron), V. giganteus major Toucas, and V. zurcheri (Douvillé) among the hippuritids, and Plagioptychus aguilloni (d´Orbigny) and P. toucasi Matheron among the plagiopychids. As a consequence of this systematic study, the taxonomy of the lower Santonian Pyrenean rudists became highly simplified and clarified. The record and subsequent analysis of the rudist species occurrences, and also of the different shell morphologies of the same species, in the different facies contributes to the understanding of the relationship between the palaeoenvironmental parameters and the faunal composition in the Late Cretaceous rudist bioconstructions.
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Oviedo, García Angélica. "Rudistas del Cretácico superior del centro al sureste de México (recuento sistemático de rudistas americanos)." Doctoral thesis, Universitat Autònoma de Barcelona, 2006. http://hdl.handle.net/10803/3440.
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Para contribuir a poner en claro la taxonomía de los rudistas americanos se ha creado una base de datos llamada American 2000 y el catalogo de los rudistas de América. La base de datos consta de una parte con toda la bibliografía sobre rudistas americanos y está relacionada con otra parte sobre la sistemática de los rudistas de América. El catalogo de rudistas americanos constituye una guía rápida de géneros y especies de rudistas de América y deja al descubierto grupos problemáticos que necesitan una revisión.Estas herramientas han servido como base para el estudio de un grupo de rudistas del Cretácico superior en México, en los estados de San Luis Potosí, Guerrero y Chiapas. Para este trabajo sistemático se ha trabajado con material fósil colectado en distintas campañas de campo en México desde el año 1998. Dicha fauna se encuentra en las formaciones El Abra, El Doctor (Turoniense o superior) y Cárdenas (Campaniense-Maastrichtiense) en el estado de San Luis Potosí, la Formación Cuautla en Guerrero (Turoniense) y en las formaciones Ocozocoautla y Angostura (Campaniense-Maastrichtiense) en el estado de Chiapas. Se han estudiado 13 yacimientos en San Luis Potosí de los cuales los yacimientos de Amoladeras y Cárdenas son los más ricos en ejemplares de rudistas. En Guerrero se han encontrado 3 yacimientos y en Chiapas 7.
Se han descrito 26 especies que corresponden a 16 géneros, pertenecientes a las familias Radiolitidae, Plagioptychide, Hippuritidae y Antillocaprinidae. Se describe la estructura de las láminas de la concha de Biradiolites rudissimus que no había sido descrita. Se describe el aparato miocardinal de Durania ojanchalensis, Tampsia floriformis, Thyrastylon adhaerens y Coralliochama gboehmi el cual no era conocido hasta el momento. Se revisa a Macgillavryia nicholasi y se coloca dentro del género Thyrastylon. Se describe a Eoradiolites liratus y a Durania arnaudi ampliamente conocidas en Europa, África y Asia, siendo los primeros registros para el continente americano. Se hace la descripción de un género nuevo perteneciente al grupo de radiolítidos con canales, para la formación señalada como El Abra, en el estado de San Luis Potosí. Se describe la estructura de los poros de la valva izquierda para Praebarrettia sparcilirata que no era conocida hasta el momento. Se describen dos especies ya conocidas en América del género Titanosarcolites, T. giganteus y T. macgillavryi y una especie nueva. Mitrocaprina tschoppi y Antillocaprina pugniformis hasta ahora sólo registradas para la región del Caribe y Biradiolites rudissimus y Praebarrettia sparcilirata sólo registradas para Chiapas, ahora se conocen para la Formación Cárdenas en San Luis Potosí. Durania curasavica encontrada hasta ahora en el Caribe y Chiapas, se da a conocer en yacimientos del estado de Guerrero. Vaccinites macgillavryi conocida en el Caribe y en Guerrero, se encuentra ahora en estratos atribuidos a la Formación El Abra, pero de edad Turoniense o superior. Gracias a este trabajo se ha ampliado el inventario de especies conocidas en la provincia caribeña para la parte central de México (Fm. Cárdenas). Se han identificado especies en San Luis Potosí de edad Turoniense o superior en calizas atribuidas a materiales del Cretácico medio de la Formación El Abra. Se espera que este trabajo contribuya a clarificar la estratigrafía de esta región. Además se pone especial énfasis en la variabilidad intraespecífica de algunas especies, como es el caso de Biradiolites rudissimus y Vaccinites macgillavryi y en el estudio de la estructura de las láminas de la concha en los radiolítidos, lo cual es fundamental para la atribución al nivel de género y especie.
To contribute clarify the american rudists taxonomy a database called American 2000 is created, along with the american rudists catalog. Database is made of two parts, a bibliographic one from all-american rudists, which it is related to a second part about systematics of american rudists as well. American rudists catalog works as a quick sight into the american rudists taxa and at the same time intends to show problematic groups pending to review.
These tools have been the base for an Upper Cretaceous rudists study in Mexico, which crops out in San Luis Potosi, Guerrero and Chiapas states. The paleontological material used for this study comes from a few field trips in Mexico since 1998. This fauna forms part of El Abra, El Doctor (Turonian and upper) and Cardenas (Campanian-Maastrichtian) Formations in San Luis Potosi, Cuautla Formation in Guerrero (Turonian), besides Ocozocoautla and Angostura Formations (Campanian-Maastrichtian) in Chiapas State. There are 13 outcrops in San Luis Potosi, the ones from Amoladeras and Cardenas are the richest in rudists specimens. For Guerrero there are 3 and 7 for Chiapas.
There have been described 26 species belonging to 16 genera, from Radiolitidae, Plagioptychidae, Hippuritidae and Antillocaprinidae families. It is described the shell laminae structure from Biradiolites rudissimus not known until today. It is described the myocardinal apparatus in Durania ojanchalensis, Tampsia floriformis, Thyrastylon adhaerens and Coralliochama gboehmi unknown until now. It is review Macgillavryia nicholasi and place into the genus Thyrastylon. There are described Eoradiolites liratus and Durania arnaudi widely known in Europe, Africa and Asia, been the first report of them in the american continent. It is made the description of a new genus that belongs to the canaliculated radiolitids group, which is assigned to El Abra Formation in San Luis Potosi state. It is described the pores structure of the left valve for Praebarrettia sparcilirata not known until now. There are described two well-known species from America who belong to the genera Titanosarcolites, T. giganteus and T. macgillavryi besides there is a new species. Mitrocaprina tschoppi and Antillocaprina pugniformis just founded in the caribbean region and Biradiolites rudissimus and Praebarrettia sparcilirata only known from Chiapas, now are assigned to Cardenas Formation in San Luis Potosi. Durania curasavica known from the Caribbean and Chiapas, shows up in outcrops in Guerrero state. Vaccinites macgillavryi founded in the Caribbean and Guerrero, now figures in strata assigned to El Abra Formation, but from Turonian age or upper. Thanks to this work the register of known species in the Caribbean province has been expanded for Central Mexico (Cardenas Fm.). There are species identified in San Luis Potosi of Turonian age or upper in limestones attributed to middle Cretaceous materials from El Abra Formation. It is expected that this study lead to clarify the stratigraphy of this region. Besides, it has been taken special attention on intraspecific variability of some species, like is the case of Biradiolites rudissimus and Vaccinites macgillavryi, and in the study of shell laminae structure in radiolitids, what is find to be basic in assigning genus and species.
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Troya, García Luis. "Rudistas (Hippuritida, Bivalvia) del Cenomaniense-Coniaciense (Cretácico superior) del Pirineo meridional-central. Paleontología y bioestratigrafía." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/385983.
Full textAbstract:
Los bivalvos rudistas están ampliamente representados entre las sucesiones de materiales carbonatados someros correspondientes al margen sur de la cuenca pirenaica durante el Cretácico superior y que hoy día afloran a lo largo del Pirineo meridional-central. Las faunas del Coniaciense superior/Santoniense inferior al Maastrichtiense son bastante bien conocidas y han sido objeto de diferentes estudios, pero no es así para las anteriores que, si se conocen, es principalmente por citas en algunos trabajos.
El estudio de diferentes afloramientos correspondientes al Cenomaniense, Turoniense superior y Coniaciense, alrededor de la cuenca de Tremp (zona de Sopeira y la Sierra de Sant Gervàs, Congost d’Erinyà, Hortoneda, anticlinal de Bóixols-Abella-Sant Corneli y sinclinal de Santa Fe, y Sierra del Montsec), ha proporcionado una abundante fauna de rudistas a partir de la cual se ha podido realizar un exhaustivo estudio paleontológico que comprende descripciones detalladas y actualizadas de los diferentes taxones representados, análisis de la variabilidad intraespecífica y distribución bioestratigráfica. En total se han reconocido 35 especies correspondientes a 15 géneros de 7 familias distintas.
La fauna de rudistas del Cenomaniense medio-superior está representada por Caprina adversa, Ichthyosarcolites triangularis, I. monocarinatus, I. tricarinatus, Durania blayaci, Eoradiolites sp., Sauvagesia tellensis y Sphaerulites foliaceus. Caprina adversa también se registra desde el Cenomaniense inferior.
El Turoniense superior contiene una fauna formada por Hippurites resectus, Pseudovaccinites inferus, P. petrocoriensis, P. praegiganteus, P. rousseli, Praeradiolites paillettei y Sphaerulites patera. Algunas especies bien representadas en el Coniaciense se registran de forma puntual en algún afloramiento atribuido al Turoniense superior, entre ellas Biradiolites canaliculatus, Hippurites incisus, Pseudovaccinites zurcheri o P. corbaricus?. De la misma forma, Pseudovaccinites petrocoriensis y P. corbaricus? aún se reconocen en el Coniaciense inferior.
El Coniaciense inferior, medio y superior se distingue en diferentes localidades. Se reconocen Bayleia sp., Hippurites incisus, H. socialis, Hippuritella sp. 1, Hippuritella sp. 2, P. corbaricus?, Pseudovaccinites giganteus, P. marticensis, P. petrocoriensis, P. zurcheri, Gyropleura? sp. 1, Gyropleura? sp. 2, Plagioptychus aguilloni, Plagioptychus cf. toucasi, Radiolites praegalloprovincialis, Radiolites sp. 1, Radiolites sp. 2, Biradiolites canaliculatus, Biradiolites cf. beaussetensis, Praeradiolites paillettei, Praeradiolites requieni y Sphaerulites sp.
Algunas especies están representadas durante la mayor parte del Coniaciense, mientras que otras solamente de forma local. El momento de mayor diversidad taxonómica se produce en el Coniaciense superior, cuando se registran conjuntamente la mayoría de especies de esa edad.Rudist bivalves are widely represented among the successions of shallow carbonate materials corresponding to the southern margin of the Pyrenean basin during the Late Cretaceous and that emerge today along the South-central Pyrenees. The upper Coniacian/lower Santonian to Maastrichtian faunas are well known and have been the subject of several studies but it is not the case for the older ones, mainly known through appointments in some works. The study of different outcrops of the Cenomanian, upper Turonian, and Coniacian around the Tremp basin (Sopeira area and the Sierra de Sant Gervàs, Congost d'Erinyà, Hortoneda, Bóixols-Abella-Sant Corneli anticline and Santa Fe syncline, and Sierra del Montsec), has provided an abundant rudists fauna on which it has been possible to perform an exhaustive paleontological study, comprising detailed and updated descriptions of the various taxa represented as well as an analysis of both their intraspecific variability and biostratigraphical distribution. In total, 35 species corresponding to 15 genera of 7 different families have been recognized. The middle-upper Cenomanian rudists fauna is represented by Caprina adversa, Ichthyosarcolites triangularis, I. monocarinatus, I. tricarinatus, Durania blayaci, Eoradiolites sp., Sauvagesia tellensis and Sphaerulites foliaceus. Caprina adversa also is recorded from the lower Cenomanian. The upper Turonian contains a rudists fauna composed of Hippurites resectus, Pseudovaccinites inferus, P. petrocoriensis, P. praegiganteus, P. rousseli, Praeradiolites paillettei and Sphaerulites patera. Species well represented in the Coniacian as Biradiolites canaliculatus, Hippurites incisus, Pseudovaccinites zurcheri or P. corbaricus?, are recorded sporadically in some outcrops attributed to the upper Turonian. At the same time, Pseudovaccinites petrocoriensis and P. corbaricus? are still recorded in the lower Coniacian. The lower, middle and upper Coniacian is identified in different locations. The following rudist taxa are recognized: Bayleia sp., Hippurites incisus, H. socialis, Hippuritella sp. 1, Hippuritella sp. 2, P. corbaricus?, Pseudovaccinites giganteus, P. marticensis, P. petrocoriensis, P. zurcheri, Gyropleura? sp. 1, Gyropleura? sp. 2, Plagioptychus aguilloni, Plagioptychus cf. toucasi, Radiolites praegalloprovincialis, Radiolites sp. 1, Radiolites sp. 2, Biradiolites canaliculatus, Biradiolites cf. beaussetensis, Praeradiolites paillettei, Praeradiolites requieni and Sphaerulites sp. Some species are represented during most of the Coniacian, while other only locally. The time of greatest taxonomic diversity occurs in the upper Coniacian, when most of that age species are recorded together.
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Rineau, Valentin. "Un nouveau regard cladistique sur l'anatomie comparée, la phylogénie, la systématique et la paléoécologie des rudistes (Bivalvia, Hippuritida)." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066503/document.
Full textAbstract:
Les rudistes bivalves forment un groupe monophylétique qui s’étend dans le registre fossile de 160 à 66 millions d’années. L’objectif de cette thèse est de porter un nouveau regard sur l’histoire évolutionnaire de ce groupe dans le cadre de la théorie cladistique. Dans une première partie sont posées les bases théoriques, méthodologiques et techniques de l’analyse à trois éléments. Le concept de triplet permet de proposer des arguments sur la pertinence des arbres consensus. La méthode d’analyse à trois éléments est ensuite comparée à la méthode de parcimonie grâce à des arguments théoriques et méthodologiques, ainsi que par des simulations basées sur des modèles d’évolution. Dans une seconde partie, nous appliquons la théorie et la méthode à la reconstruction de l’histoire des rudistes. Le genre Ichthyosarcolites est révisé, et des analyses statistiques permettent de tester la pertinence des hypothèses d’homologie basée sur la forme de la coquille. Les hypothèses d’homologie sont revues et de nouveaux caractères basés sur les myophores et les canaux palléaux sont formalisés pour l’ensemble des Hippuritida. La nouvelle phylogénie qui en découle est cohérente avec l’âge géologique et permet de raffiner l’histoire évolutive des rudistes au Crétacé. L’étude de couches Cénomaniennes du Bassin Sud-Provençal (Var, France) nous permettent de faire un lien entre l’histoire de la diversification des rudistes et leur paléoécologieThe rudist bivalves form a monophyletic group that extends in the fossil record from 160 to 66 million years. The objective of this thesis is to propose new insights at the evolutionary history of this group within the framework of cladistic theory. In the first part, we lay the theoretical, methodological and technical foundations of the three-item analysis. The concept of triplet allows us to propose arguments on the relevance of consensus trees in cladistics. The three-item analysis method is then compared to the method of parsimony using theoretical and methodological arguments, and simulations based on evolutionary models. In a second part, we apply the theory and method to the reconstruction of the rudist history. The genus Ichthyosarcolites is reviewed, and statistical analyses are used to test the relevance of homology hypotheses based on shell shape. Hypotheses of homology and new characters based on myophores and pallial canals are tested on the Hippuritida. The new, resulting phylogeny is consistent with known geological occurrences of the group and further our understanding of rudist evolutionary history during the Cretaceous. The study of Cenomanian outcrops of the South Provence Basin (Var, France) allows us to make a link between the history of the diversification of rudists and their paleoecology
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Swinburne, Nicola Helga Margaret. "The extinction of the rudist bivalves." Thesis, Open University, 1990. http://oro.open.ac.uk/54415/.
Full textAbstract:
The rudist bivalves were one of the many and varied groups of organisms to be extinguished at the end of the Cretaceous Period. They were a group of bivalves which evolved during Late Jurassic times to dominate the carbonate shelves on the margins of the Tethys Ocean during the Cretaceous Period. Through Late Cretaceous times their diversity climbed to a peak and then entered a period of rapid decline, resulting eventually in the complete extinction of the group. Theories as to the cause of that extinction should clearly be based upon a knowledge of the detailed pattern of the decline. Most important is the question of the timing of the extinction: How long did it take from the peak of diversity to the elimination of the entire group? Is there one main extinction event - or are there several - or is the pattern a gradual decline? In answering these questions this work adopts a new approach to dating end Cretaceous strata by using strontium isotope stratigraphy. The method works by measuring the 87 Sr/86Sr of palaeo-seawater preserved in marine carbonate, such as the thick low-Mg calcite layer of rudist shells. The 87Sr/86Sr of seawater was changing fairly rapidly through time in the latest Cretaceous. The pattern of change has been established in detail using samples from Boreal sequences of which the ages are known with respect to the belemnite stratigraphy. Using this as a standard graph, Tethyan rudist samples have been dated by a comparison of the Sr isotope ratio. The use of Sr isotope stratigraphy has enabled a time axis to be established, against which the ranges of rudist bivalves and of their facies have been ploued. From these data it can be clearly seen that the ranges of many of the established biostratigraphic markers are in error and that the stage boundaries, as defined by the belemnite and planktonic foraminiferal stratigraphies, are offseL When the pattern of rudist diversity is plotted against this time scale it can be seen that, at a specific level, the rudists were at their most diverse at the Campanian/Maastrichtian boundary. Their decline lasted until I almost the end of the Maastrichtian after which the only survivors are Tertiary forms. The decline is related to the disappearance of rudist facies with the end Cretaceous regression, though that graph is slightly displaced from that of rudist diversity. This shows that the rudist extinction is not merely due to non-exposure of terminal Maastrichtian strata.
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Le, Goff Johan. "Evolution tectono-sédimentaire du système carbonaté "Plateforme Apulienne - Bassin Ionien" au Crétacé supérieur dans le sud de l'Albanie : faciès, géométries, diagénèse et propriétés réservoirs associées." Thesis, Bordeaux 3, 2015. http://www.theses.fr/2015BOR30024/document.
Full textAbstract:
L’intérêt scientifique porté depuis plusieurs décennies au développement des plateformes carbonatées tropicales s’explique par la complexité des facteurs de contrôle de la sédimentation, qui montre une influence de la tectonique, du climat, de l’eustatisme, de l’hydrodynamisme etc… Les plateformes carbonatées ne sont pas seulement des environnements enclins à accumuler des sédiments, mais sont aussi de prolifiques « usines » à carbonates qui produisent davantage que ce qu’elles peuvent stocker. Les sédiments en excès sont transférés vers le bassin profond. Ainsi, les transitions plateforme – bassin illustrent les interactions entre production carbonatée in-situ, transfert, et accumulation sédimentaire issue de la re-sédimentation. Dans le sud-ouest de l’Albanie, la série carbonatée du Crétacé Supérieur est composée de dépôts sédimentaire de plateforme et de bassin. Ces successions sont à présent intégrées dans le système chevauchant de la chaîne Dinarides - Hellénides, dont la mise en place est contemporaine d’une phase de déformation orogénique Plio-Holocène. La paléogéographie de la région péri-Adriatique au Crétacé Supérieur révèle une juxtaposition de méga-plateformes et de bassins adjacents dont le remplissage est en partie conditionné par la remobilisation gravitaire des sédiments de la bordure de plateforme. Les investigations sont menées sur cinq zones d’étude. Elles intègrent des descriptions faciologiques macro- et microscopiques pour chacune des huit successions étudiées. Les unités définies font l’objet d’une cartographie à l’échelle de la zone d’étude qui précise l’architecture stratigraphique du système. La datation des dépôts repose sur une étude biostratigraphique, elle est renforcée par les données chronostratigraphiques des isotopes du strontium. Sur la plateforme, les descriptions faciologiques sont appuyées par des méthodes complémentaires de pétrographie (cathodoluminescence, épifluorescence, microscopie électronique à balayage), de pétrophysique (porosimétrie à injection mercure) et de géochimie (isotopes stables du carbone et de l’oxygène) visant à révéler la dynamique de sédimentation et les propriétés réservoir de la succession.Les conditions de sédimentation sont précisées, i) sur la plateforme, dix faciès spécifiques sont identifiés, représentatifs de contidions de dépôt supra-, inter-, et subtidales. Ils s’intègrent dans des motifs d’empilement distinctifs (small-scale sequences) qui attestent le caractère cyclique de la sédimentation, contrôlé par des fluctuations haute-fréquence et basse amplitude du niveau marin relatif; ii) dans le bassin, quatorze faciès sont classés suivant le mécanisme de transport sédimentaire dominant. La répartition spatiale des dépôts permet d’identifier la provenance et les sources préférentielles du matériel calci-clastique. L’évolution tectono-sédimentaire plateforme – bassin au Crétacé Supérieur est déterminée par deux séquences: i) du Cénomanien au Turonien, la sédimentation de plateforme est caractérisée par l’aggradation plus de 700 mètres de faciès intertidaux organisés en séquences (small-scale sequences) émersives ou sub-émersives. Aucun transfert significatif n’est attesté dans le bassin adjacent, témoignant d’une relative stabilité du système évoluant dans un contexte subsident ; ii) l’intervalle Coniacien – Santonien marque l’installation d’une plateforme à rudistes favorable au transfert sédimentaire. Ce dernier se traduit par une progradation marquée des dépôts gravitaires dans le bassin pendant le Campanien. Cette dynamique de transfert est accentuée par la mise en place de slumps résultants du démantèlement tectonique de la bordure de plateforme au Campanien Supérieur et MaastrichtienThe evolution of tropical carbonate platforms depends on complex interacting factors influencing the sedimentation, such as tectonism, climate, eustacy, hydrodynamism etc… Due to this complexity, it has been of scientific interest for decades. Carbonate platforms are not only prone to accumulate sediments, but also represent prolific carbonates “factories” producing more than they can store on their tops. Excess sediments are shed basinward. Platform-to-basin transitions exemplify interactions between in-situ carbonate production, transfer and sedimentary accumulations resulting from re-sedimentation. In south-west Albania, the Upper Cretaceous carbonate series are made up of platform and basinal deposits. Sedimentary successions are presently integrated in the Dinarides-Hellenides fold-and thrust belt that originate from a Plio-Holocene phase of the Alpine Orogeny. The paleogeographic setting during the Late Cretaceous reveals a juxtaposition of mega-platforms and adjacent basins, partly filled with sediments derived from the shelf edge. Our scientific investigations focused on five study areas. Macro- and microfacies descriptions are provided for eight platform and basin successions. Sedimentary units are defined and mapped on each study area, supporting the stratigraphic reconstruction of the system. Dating is based on biostratigraphy and supported by strontium-isotope data. Regarding platform deposits, facies descriptions are seconded by complementary methods of petrography (cathodoluminescence, epifluorescence, scanning electron microscopy), petrophysics (mercury intrusion porosimetry), and geochemistry (stable carbon and oxygen isotopes), aiming to precise the sedimentation dynamics and reservoir properties of the succession. The sedimentation conditions are specified: i) within the platform, ten specific facies are identified, precising the depositional setting that comprise supra-, inter- and subtidal environments. These facies are integrated in distinctive stacking patterns (small-scale-sequences) pointing to a cyclic sedimentary dynamic controlled by high-frequency and low-amplitude sea level changes; ii) the basinal deposits comprise fourteen facies classified according to the dominant grain-support mechanism. Spatial distribution of the deposits allowed identifying the provenance and preferential sources of calciclatic sediments. The tectono-sedimentary evolution of the platform-to-basin system during the Late Cretaceous can be subdivided into two sequences: i) from the Cenomanian to the Turonian, the platform sedimentation is characterized by a substantial aggradation (700 meters) of intertidal small-scale sequences. No significant transfer was evidenced in the adjacent Ionian Basin, pointing to stable conditions in a subsiding context; ii) the Coniacian-Santonian interval evidences the establishment of a rudist platform massively shedding sediments basinward during the Campanian. A clear progradation of gravity-flow deposits is attested during this period. During the Upper Campanian and Maastrichtian, this transfer is accentuated by the setting of tectonically-triggered slumps resulting from the dismantling of the platform edge
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Simonpiétri, Gilles (1970. "Systématique phylogenèse ontogenèse chez les Hippuritidae (Rudistes du crétacé supérieur)." Aix-Marseille 1, 1999. http://www.theses.fr/1999AIX11053.
Full textAbstract:
Ce travail repose sur l'etude de plusieurs populations d'hippuritidae, d'age turonien a campanien, provenant du sud-est de la france, des pyrenees et du sultanat d'oman. Pres de mille specimens ont ete soumis a une analyse biometrique, les mieux conserves ont permis l'etude de l'ontogenese. Le traitement statistique des donnees permet, sur des bases objectives et en tenant compte d'une forte variabilite intraspecifique, de preciser les limites de chaque espece et de proposer des revisions systematiques. L'etude des principales especes de vaccinites de provence et des pyrenees aboutit a une simplification de la systematique. Il a ete reconnu une espece ancestrale unique, vaccinites inferus, dont derivent au turonien superieur trois lignees phyletiques assimilables a des chrono-especes. Dans chacune d'elle trois especes paleontologiques (ou transiants) ont pu etre distinguees, leur evolution se realise par anagenese. Vaccinites inferus etait repandu dans tout le domaine mediterraneen, mais a partir du coniacien les especes qui lui succedent etaient confinees a la province occidentale. L'etude des vaccinites d'oman permet de reconstituer la lignee du vaccinites inaequicostatus. Cette lignee de la province orientale rassemble trois especes et parait avoir une origine commune avec les vaccinites du domaine americano-caraibe. Les comparaisons effectuees entre les plus anciennes formes d'hippuritidae mettent en evidence un important polymorphisme ecologique s'exprimant principalement sur le mode de croissance des individus. Cela permet d'envisager l'existence, au debut du turonien, d'une espece primitive unique a l'origine de tous les hippuritidae. L'etude de l'ontogenese montre que l'evolution phyletique peut etre interpretee par l'action d'heterochronies du developpement, principalement l'acceleration et la neotenie. Une classification basee sur les caracteres internes est proposee ; deux morphogenres sont distingues : hippurites et vaccinites.
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Ross, Donald James. "Facies analysis and diagenesis of Tethyan rudist reef complexes." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659009.
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Chartrousse, Alexandre. "Les Caprinidae (rudistes) du crétacé inférieur." Aix-Marseille 1, 1998. http://www.theses.fr/1998AIX11088.
Full textAbstract:
La revision de l'ensemble des caprinidae du cretace inferieur, met en evidence 48 especes reparties dans 17 genres appartenant aux deux sous-familles des caprininae et des coalcomaninae. Huit especes ont ete invalidees. Deux nouveaux genres, pacificaprina et pseudocaprina, ainsi que quatre nouvelles especes, sont proposes, trois taxons etant laisses en nomenclature ouverte. La famille et les sous-familles sont definies d'apres l'appareil myophoral et non pas sur la presence ou non de canaux. Cette nouvelle acception de la famille et des deux sous-familles repose essentiellement sur le developpement du myophore posterieur dans l'une ou l'autre valve et sur la position des insertions musculaires correspondantes. Les criteres diagnostiques specifiques et generiques sont bases sur la disposition et l'architecture des canaux. Ainsi la sous-famille des caprininae est caracterisee par un developpement d'une lame myophorale posterieure sur la valve inferieure et surtout par la position externe de l'insertion musculaire sur cette lame alors qu'elle est interne sur celle de la valve superieure. La sous-famille des coalcomaninae est caracterisee par le developpement d'une lame myophorale posterieure sur la valve superieure et surtout par la position externe de l'insertion musculaire sur cette lame alors qu'elle est interne sur celle de la valve inferieure. La typologie des canaux completee par une analyse geometrique et architecturale est replacee dans un cadre evolutif qu'elle contribue a definir. L'evolution morphologique de la geometrie des canaux, l'augmentation de la complexite de l'architecture par l'apparition de planchers ou de cloisons transverses, et le developpement progressif des canaux sur l'une et l'autre valve et sur leur pourtour, ont servi de base a l'etude cladistique et evolutive. Les caprinidae occupent un milieu relativement etroit dans le domaine externe des plates-formes carbonatees, ils apparaissent a l'hauterivien et disparaissent a la fin du cenomanien. Les diversites generique et specifique sont les plus fortes a l'aptien inferieur pour les caprininae et a l'albien pour les coalcomaninae. Les deux sous-familles subissent la crise medio-aptienne. Du point de vue de la repartition paleobiogeographique des caprinidae, les coalcomaninae ont une distribution exclusivement americaine et ouest-pacifique, alors que les caprininae ont une repartition cosmopolite bien que la pluspart des especes se cantonnent au domaine mediterraneen.
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Al-Ghamdi, Nasser Mohammad. "Facies, Sequence Framework, and Evolution of Rudist Buildups, Shu'aiba Formation, Saudi Arabia." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33225.
Full textAbstract:
The Cretaceous (Early Aptian) Shu'aiba Formation, Shaybah field, Saudi Arabia, is 60 km long by 12 km wide and 150 m thick, and is a giant carbonate reservoir. It formed on a regional carbonate ramp bordering an intrashelf basin. The succession consists of a composite sequence of seven high frequency sequences. Sequences 1 and 2 formed a deeper open platform of Palorbitolina-Lithocodium wackestone, with maximum flooding marked by planktic foram mudstone. Sequence 2 built relief over northern and southern blocks, separated by an intraplatform depression. They form the composite sequence TST. The remaining sequences developed a platform rimmed by rudist rudstone backed by rudist floatstone back-bank and lagoonal fine skeletal peloidal packstone; slope facies are fine skeletal fragmented packstone. Aggradational sequences 3 to 5 make up the composite sequence early highstand. Progradational sequences 6 and 7 are the composite sequence late highstand marking the deterioration of the Offneria rudist barrier and deposition of widespread lagoonal deposits, where accommodation may have been created by syn-depositional growth faulting that moved the northern block down. Shu'aiba deposition on the platform was terminated by long-term sea-level fall and karsting.
The succession is dominated by approximately 400 k.y., 4th order sequences and 100 k.y. parasequences driven by long term eccentricity and short term eccentricity respectively, similar to the Pacific guyots of this age. This suggests that early Cretaceous climate may have been cooler and had small ice sheets and was not an ice-free greenhouse world.
Master of Science
Books on the topic "Rudista"
1
Pleničar, Mario. Upper cretaceous rudists in Slovenia: Zgornjekredni rudisti v Sloveniji. Ljubljana: Slovenska Akademija Znanosti in Umetnosti, 2005.
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2
1936-, Scott Robert William, ed. Cretaceous rudists and carbonate platforms: Environmental feedback. Tulsa, Okla: SEPM (Society for Sedimentary Geology), 2007.
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3
Vasilʹevich, Menner Vladimir, ed. I͡Urskie i melovye rudisty: Stratigraficheskoe i geograficheskoe rasprostranenie. Moskva: "Nauka", 1989.
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4
Steuber, Thomas. Jurassic-Cretaceous Rudists (Mollusca, Hippuritacea): Bibliography 1758-1994. Dresden: CPress, 1996.
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Zaboravljena Istra: Zemljopisna i rudinska imena hrvatske Istre. Pula: Histria Croatica C.A.S.H., 2013.
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Parona, Carlo Fabrizio. Volume dedicato alla raccolta degli scritti più significativi di C.F. Parona sulle Rudiste. Roma: Istituto poligrafico e Zecca dello Stato, 1990.
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7
International Conference on Rudists (5th 1999 Erlangen, Germany). Contributions to the 5th International Congress on Rudists, held in Erlangen, Germany, 1999. Stuttgart: E. Schweizerbart, 2004.
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Satura rudina: Studi in onore di Pietro Luigi Leone. Lecce: Pensa multimedia, 2009.
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Rudisten-Assoziation der keltiberischen Oberkreide SE-Spaniens: Paläontologie, Palökologie und Sediment-Organismus-Wechselwirkungen. München: Verlag der Bayerischen Akademie der Wissenschaften in Kommission beim Verlag C.H. Beck, 2001.
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Cobban, William Aubrey. Occurrence of the rudistid Durania cornupastoris (Des Moulins, 1826) in the upper Cretaceous Greenhorn Limestone in Colorado. [Washington: U.S. G.P.O., 1991.
Find full textBook chapters on the topic "Rudista"
1
Salama, Yasser, and Gouda Abdel-Gawad. "Tethyan Non-rudist Associations from the Cretaceous Rudist Formations in Northern Egypt." In Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas, 95–98. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01452-0_23.
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Zaghbib-Turki, D. "Cretaceous Coral-Rudist Formations in Tunisia." In North African Cretaceous Carbonate Platform Systems, 83–110. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0015-4_5.
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Mehlhorn, Heinz. "Pollenia rudis." In Encyclopedia of Parasitology, 2237. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_2479.
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Mehlhorn, Heinz. "Pollenia rudis." In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_2479-2.
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Skelton, Peter W., Eulàlia Gili, Thomas Steuber, Robert Scott, and Simon Mitchell. "Rudists in the Revised Bivalvia ‘Treatise Online’." In Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas, 25–27. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01452-0_6.
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Dhondt, Annie V. "Palaeogeographic distribution of Cretaceous Tethyan non-rudist bivalves." In New Aspects on Tethyan Cretaceous Fossil Assemblages, 75–94. Vienna: Springer Vienna, 1992. http://dx.doi.org/10.1007/978-3-7091-5644-5_6.
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Skelton, P. W. "Rudist Evolution and Extinction — A North African Perspective." In North African Cretaceous Carbonate Platform Systems, 215–27. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0015-4_13.
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Enos, Paul. "Diagenesis of Mid-Cretaceous Rudist Reefs, Valles Platform, Mexico." In Reef Diagenesis, 160–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82812-6_9.
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Zagrarni, M. F., M. H. Negra, and S. Melki. "Turonian Rudist-Coral Limestones in Jebel Bireno, Central Tunisia." In North African Cretaceous Carbonate Platform Systems, 111–28. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0015-4_6.
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Scott, Robert, Whitney Campbell, Brian Diehl, Xin Lai, Allison Porter, and Yulun Wang. "Barremian-Albian (Lower Cretaceous) Rudist Chronostratigraphy, Caribbean Province North America." In Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas, 87–89. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01452-0_21.
Full textConference papers on the topic "Rudista"
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Al fudhaili, Najat, Matthias López Correa, Axel Munnecke, Claudio Mazzoli, and Jaroslaw Stolarski. "RUDIST BIVALVES AS ENVIRONMENTAL ARCHIVES." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-352219.
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Thorpe, Emily, and Claudia Johnson. "TAXONOMY AND PALEOECOLOGY OF MID-CRETACEOUS RUDIST BIVALVES FROM PUERTO RICO." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358571.
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Zimmerman, Alexander N., Claudia C. Johnson, George E. Phillips, and Dana J. Ehret. "TAXONOMY OF RUDIST BIVALVES FROM UPPER CRETACEOUS STRATA, MISSISSIPPI EMBAYMENT, USA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-303886.
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Zhang, Jie. "Rudists Reservoir Characterization in Middle Cretaceous Mishrif Formation of Halfaya Oilfield, Iraq." In SPE Reservoir Characterisation and Simulation Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/175611-ms.
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Sadooni, Fadhil. "Challenges Associated with Exploring the Cretaceous Rudist Basin-Margin Buildups of the Arabian Basin." In GEO 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.248.016.
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Zimmerman, Alex, Claudia Johnson, George E. Phillips, and Dana J. Ehret. "TAXONOMY AND PALEOECOLOGY OF RUDIST BIVALVES FROM UPPER CRETACEOUS STRATA, GULF COASTAL PLAIN, USA." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-359064.
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Scott, Robert W., Thomas Steuber, Simon F. Mitchell, and Peter W. Skelton. "GLOBAL CHANGES IN RUDIST BIVALVE DIVERSITY AND EFFECTS ON EARLY CRETACEOUS GULF COAST COMMUNITIES." In 51st Annual GSA South-Central Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017sc-288959.
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Ricci, C., R. Cestari, G. Rusciadelli, P. Di Michele, N. Carras, and P. Shiner. "Rudist-Bearing Carbonates and Reservoirs: the Need of Mid-Cretaceous Surface Analogues in the Mediterranean Tethys." In 81st EAGE Conference and Exhibition 2019. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201901466.
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Yamanaka, Motoyoshi, Takashi Nanjo, and Takashi Taniwaki. "Evaluation of Rudist Depositional Environment using X-ray CT Scan Late Cretaceous Cenomanian in Offshore Abu Dhabi." In Abu Dhabi International Petroleum Exhibition & Conference. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/192923-ms.
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Sadooni, Fadhil. "Fate of the cretaceous rudist buildups in the Arabian basin and its impact on their reservoir characteristics." In International Conference and Exhibition, Barcelona, Spain, 3-6 April 2016. Society of Exploration Geophysicists and American Association of Petroleum Geologists, 2016. http://dx.doi.org/10.1190/ice2016-6313363.1.
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