Journal articles: 'Rudistes'

1

Macé-Bordy, Jacqueline. "Alcide dˈOrbigny et les Rudistes." Comptes Rendus Palevol 1, no. 7 (December 2002): 565–71. http://dx.doi.org/10.1016/s1631-0683(02)00056-8.

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Masse, J. P. "Paleobiogeographie des rudistes du domaine peri mediterraneen a l'Aptien inferieur." Bulletin de la Société Géologique de France I, no. 5 (September 1, 1985): 715–21. http://dx.doi.org/10.2113/gssgfbull.i.5.715.

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3

Özer, Sacit. "Description de quelques Rudistes à canaux dans le Cénomanien de Turquie." Géologie Méditerranéenne 15, no. 2 (1988): 159–67. http://dx.doi.org/10.3406/geolm.1988.1402.

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4

Chartrousse, Alexandre, and Jean-Pierre Masse. "Coalcomaninae (Rudistes, Caprinidae) nouveaux de l'Aptien inférieur des Mid Pacific Moutains." Geobios 31 (January 1998): 87–92. http://dx.doi.org/10.1016/s0016-6995(98)80067-3.

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5

Chikhi-Aouimeur, Fettouma. "Distribution paléogéographique des rudistes du Cénomanien moyen a supérieur en Algérie." Geobios 31 (January 1998): 93–99. http://dx.doi.org/10.1016/s0016-6995(98)80068-5.

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6

Simonpiétri, Gilles, and Jean Philip. "Relations ontogenèse–phylogenèse chez les rudistes : l'exemple des Hippuritidae Gray, 1848." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 330, no. 10 (May 2000): 717–24. http://dx.doi.org/10.1016/s1251-8050(00)00191-9.

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7

Macé-Bordy, Jacqueline. "Révision des rudistes crétacés (Bivalvia) de la Paléontologie française d’Alcide d’Orbigny." Annales de Paléontologie 93, no. 1 (January 2007): 1–26. http://dx.doi.org/10.1016/j.annpal.2007.01.002.

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8

Macé-Bordy, Jacqueline. "Révision des rudistes crétacés (Bivalvia) de la Paléontologie française d’Alcide d’Orbigny." Annales de Paléontologie 93, no. 2 (April 2007): 67–105. http://dx.doi.org/10.1016/j.annpal.2007.03.003.

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9

Macé-Bordy, Jacqueline. "Révision des rudistes crétacés (Bivalvia) de la Paléontologie française d’Alcide d’Orbigny." Annales de Paléontologie 93, no. 3 (July 2007): 149–78. http://dx.doi.org/10.1016/j.annpal.2007.06.001.

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10

Masse, Jean-Pierre, and Alexandre Chartrousse. "Les Caprina (Rudistes) de l'Aptien inférieur d'Europe occidentale: Systématique, biostratigraphie et paléobiogéographie." Geobios 30, no. 6 (January 1997): 797–809. http://dx.doi.org/10.1016/s0016-6995(97)80179-9.

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11

Bilotte, M., and J. Philip. "Les faunes de Rudistes du crétacé supérieur charentais du chantier de l'autoroute “l'Aquitaine”." Cretaceous Research 6, no. 1-2 (March 1985): 79–84. http://dx.doi.org/10.1016/0195-6671(85)90029-1.

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12

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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13

M'Rabet, Ali, H. Bismuth, and N. Ben Ayed. "Le complexe récifal campanien à Rudistes du Jebel Serraguia, Centre Ouest de la Tunisie." Géologie Méditerranéenne 16, no. 2 (1989): 121–43. http://dx.doi.org/10.3406/geolm.1989.1421.

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14

Negra, Mohamed El Hédi, and Bruce Harold Purser. "Les monticules sénoniens à Rudistes du Jebel el Kebar, Tunisie Centrale. Anatomie, diagenèse et géométrie." Géologie Méditerranéenne 16, no. 2 (1989): 99–119. http://dx.doi.org/10.3406/geolm.1989.1420.

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15

Bilotte, Michel. "Remarques sur le genre Rhedensia Sénesse, 1939 (Rudistes, Hippuritidae). conséquences sur la phylogénie des hippuritidae." Geobios 25 (January 1992): 71–76. http://dx.doi.org/10.1016/s0016-6995(06)80315-3.

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16

Saïdi, Fouiâd, Mohamed Hédi Ben Ismaïl, and Ali M'rabet. "Les récifs coniaciens à rudistes de Tunisie centro-occidentale: sédimentologie, cadre paléogéographique et interprétation séquentielle." Journal of African Earth Sciences 24, no. 4 (May 1997): 531–48. http://dx.doi.org/10.1016/s0899-5362(97)00079-1.

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17

Squires, Richard L. "A new subgenus of neritid gastropod from the Upper Cretaceous of Baja California, Mexico." Journal of Paleontology 67, no. 6 (November 1993): 1085–88. http://dx.doi.org/10.1017/s0022336000025452.

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Numerous specimens of the neritid gastropod Nerita (Bajanerita) n. subgen. californiensis (White, 1885) are present in the Upper Cretaceous Rosario Formation at Punta Banda, Baja California, Mexico (Figure 1). Marincovich (1975) assigned these strata to a Late Campanian to Early Maastrichtian age. The strata contain extensive biostromal deposits of the caprinid rudistid bivalve Coralliochama orcutti White, 1885, that probably lived below mean wave base in a shallow-water, low-energy environment periodically affected by storm waves or currents (Marincovich, 1975). The nearby shoreline was apparently defined by steep wave-washed bedrock cliffs and local pocket beaches that formed along the margin of a forearc basin (Yeo, 1984). Scattered about in the sandstone matrix among the rudistid remains are the small-sized specimens of N. (B.) californiensis, which commonly weather out as resistant, complete shells on the surface of the rock. Saul (1970) concluded that the neritid and other shallow-water gastropods at Punta Banda accumulated in sediment-trapping depressions within the Coralliochama buildups. These gastropods had originally roamed over the algal pastures of these buildups. The color patterns preserved on many of the specimens of N. (B.) californiensis also provide evidence that the depth of water was shallow and within the photic zone. Furthermore, Sohl (1971) reported that Campanian and Maastrichtian gastropod assemblages of the Baja California region are mostly associated with rudist buildups, and warm-water rocky intertidal neritids are among the dominant faunal elements. Lowenstam and Epstein (1959), using oxygen-isotope studies of an ammonite, suggested that the Punta Banda rudistids lived at a marginally tropical temperature of about 19°C.

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18

Philip, J. "Sur les relations des marges tethysiennes au Campanien et au Maastrichtien deduites de la distribution des rudistes." Bulletin de la Société Géologique de France I, no. 5 (September 1, 1985): 723–31. http://dx.doi.org/10.2113/gssgfbull.i.5.723.

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19

El Hedi Negra, M. "Paleoenvironnement et conditions de genese du complexe senonien recifal a rudistes du Jebel El Kebar, Tunisie centrale." Bulletin de la Société Géologique de France III, no. 2 (March 1, 1987): 317–26. http://dx.doi.org/10.2113/gssgfbull.iii.2.317.

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20

Hughes, Geraint W. "The Great Pearl Bank Barrier of the Arabian Gulf as a Possible Shu’aiba Analogue." GeoArabia 2, no. 3 (July 1, 1997): 279–304. http://dx.doi.org/10.2113/geoarabia0203279.

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ABSTRACT Within the Arabian Peninsula, the Shu’aiba Formation is one of three Cretaceous carbonate formations in which rudist bivalves are an important component. The favourable hydrocarbon reservoir properties of these carbonates are primarily attributed to the presence of the rudists and their associated debris, which accumulated along the margins of an intra-shelf basin. The rudist banks caused differentiation of an earlier carbonate platform into lagoon, back-bank, bank, fore-bank and open marine environments. Understanding of the orientation of these banks has been significantly assisted by micropalaeontological analysis of the rudist-associated sediment, but may be additionally enhanced by the study of Recent large bivalves, such as the ‘fan mussel’ Pinna spp. The depositional geometries of the rudist-dominated facies of the Shu’aiba Formation may be better understood by studying the Great Pearl Bank Barrier, located on the southern flank of the Arabian Gulf, as this may present a Recent analogue for variations in sedimentation and bioclast distribution. The Great Pearl Bank Barrier complex includes a submarine ridge that extends for approximately 200 kilometers between the Qatar Peninsula and Abu Dhabi, and lies in water depths of less than 8 meters, together with a deep lagoon and barrier flank facies. The submarine barrier complex and the back island lagoons consist primarily of bivalve shells, sands and mud, in which are embedded locally dense populations of the large bivalve species Pinna bicolor Gmelin and P.mururicata (Linnaeus). These forms may serve as Recent counterparts for the extinct Aptian constratal elevator rudists, such as Glossomyophorus costatus Masse, Skelton and Sliskovic, with a form that resembles Pachytraga sp., and Agriopleura blumenbachi that characterise the back-barrier and lagoonal facies, respectively, of the Shu’aiba Formation in the region. The oysters that have colonised the barrier crest have a clinging habit and may occupy a niche that equates with the Aptian recumbent rudist Offneria murgensis.

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21

Negra, Mohamed El Hédi, and Jean Philip. "Stratigraphie et Paléontologie des formations à Rudistes et grands Foraminifères du Campanien supérieur du Jebel Kébar (Tunisie Centrale)." Géologie Méditerranéenne 12, no. 1 (1985): 49–57. http://dx.doi.org/10.3406/geolm.1985.1338.

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22

Masse, Jean-Pierre. "L'évolution des Requieniidae (Rudistes)du Crétacé inférieur: Caractères, signification fonctionnelle adaptative et relations avec les modifications des paléoenvironnements." Geobios 27, no. 3 (January 1994): 321–33. http://dx.doi.org/10.1016/s0016-6995(94)80180-0.

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23

Hughes, Geraint Wyn. "Bioecostratigraphy of the Shu’aiba Formation, Shaybah field, Saudi Arabia." GeoArabia 5, no. 4 (October 1, 2000): 545–78. http://dx.doi.org/10.2113/geoarabia0504545.

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ABSTRACT The Aptian Shu’aiba Formation forms a major carbonate reservoir in the Shaybah field of eastern Saudi Arabia. Lack of exposures and poor seismic data have forced the cored intervals to be fully exploited to provide evidence of the depositional environment and layering of the reservoir rocks and associated lithofacies. Rudist, foraminiferal and coccolith evidence indicates an Aptian age for the entire Formation, most of it being early Aptian. A major unconformity at the top of the Shu’aiba separates it from the overlying Nahr Umr Formation. Rapid biofacies variations suggest possible sequence boundaries within the Shu’aiba Formation. Semi-quantitative macropaleontological and micropaleontological analyses indicate significant paleoenvironmentally influenced lateral and vertical bioassemblage variations. Lagoon, rudist-associated back-bank, bank-crest and fore-bank, and upper-ramp depositional environments have been interpreted, of which the bank represents the gradual amalgamation of earlier isolated rudist shoals. Integrating the micropaleontological analyses with rudist assemblages has facilitated the prediction of rudist-associated reservoir facies. Variations in the micro- and macrofacies permit the Formation to be divided into three layers. (1) The “lower Shu’aiba” (without rudists) is dominated by a regionally extensive, moderately deep marine planktonic foraminiferal/algal association of Palorbitolina lenticularis-Hedbergella delrioensis-Lithocodium aggregatum and the benthonic foraminifera Debarina hahounerensis, Praechrysalidina infracretacea, Vercorsella arenata and rotalids. (2) The “middle Shu’aiba” shows the significant lateral and vertical differentiation of a rudist-rimmed shallow carbonate platform typically associated with a marine highstand. A predominance of rudist species Glossomyophorus costatus and Offneria murgensis occurs together with Lithocodium aggregatum, Palorbitolina lenticularis, Trocholina spp. and miliolid foraminifera. (3) The “upper Shu’aiba” represents an expansion of the lagoon (associated with a marine transgression), and a predominance of Agriopleura cf. blumenbachi and A. cf. marticensis rudists, together with Debarina hahounerensis, Praechrysalidina infracretacea and Vercorsella arenata. The localized distribution of the rudist Horiopleura cf. distefanoi in association with corals, is a feature of the eastern flank of the field. A coarse assemblage-based biozonation for the Shu’aiba has been proposed, but a detailed scheme is precluded by rapid diachronous biofacies variations across the Shaybah field. In addition to the major biocomponent assemblages, minor variations reveal high-frequency depositional cycles that may assist in the interpretation of the distribution and correlation of reservoir facies. The identification of bioassemblages, and the paleoenvironmental interpretation of formation micro-imager logs from vertical cores in exploration wells, has assisted the calibration of images from uncored horizontal development wells.

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24

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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25

Grosheny, D., and J. Philip. "Dynamique biosedimentaire de bancs a rudistes dans un environnement perideltaique; la formation de la Cadiere d'Azur (Santonien, SE France)." Bulletin de la Société Géologique de France V, no. 6 (November 1, 1989): 1253–69. http://dx.doi.org/10.2113/gssgfbull.v.6.1253.

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26

Philip, Jean, and A. Mermighis. "Bioconstructions et plates-formes carbonatées à Rudistes du Crétacé supérieur des zones ophiolitiques : le Massif de l'Akros (Argolide, Grèce)." Géologie Méditerranéenne 16, no. 2 (1989): 145–53. http://dx.doi.org/10.3406/geolm.1989.1422.

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27

Durand-Delga, Michel, and Jean Philip. "Le rôle précurseur de Philippe Picot de Lapeyrouse, naturaliste toulousain du Siècle des lumières, dans la paléontologie des rudistes." Comptes Rendus Palevol 2, no. 2 (March 2003): 181–96. http://dx.doi.org/10.1016/s1631-0683(03)00012-5.

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28

Hughes, G. Wyn ap G., Shameem Siddiqui, and R. Kumbe Sadler. "Shu’aiba rudist taphonomy using computerised tomography and image logs, Shaybah field, Saudi Arabia." GeoArabia 8, no. 4 (October 1, 2003): 585–96. http://dx.doi.org/10.2113/geoarabia0804585.

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ABSTRACT Rudist fossils in cored carbonates from the Shu’aiba reservoir in the Shaybah field have been used to aid the interpretation of lithofacies and reservoir facies in uncored horizontal development wells. The rudists are sufficiently large fossils that they provide well-developed and easily identified images on computerised tomography (CT) scans of cores. The CT images provide valuable information on the rudist orientation prior to damage caused by plugging and slabbing procedures. CT images, combined with the core-based fossil information, are then used to interpret the images on the formation micro-imager (FMI) logs. As the various rudist species are known to have preferentially occupied different environments during the deposition of the Shu’aiba carbonates, depositional environments can now be interpreted from the FMI logs. Specimen orientation in the core provides supplementary information on the depositional environment by discriminating between in-situ and displaced assemblages. Rudist identification in FMI images is a new tool in uncored vertical wells. In long horizontal wells, this is a major achievement and will assist in modelling the 3-D lithofacies and associated reservoir facies distribution for improving the reservoir model.

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29

MASSE, JEAN-PIERRE, MUKERREM FENERCI-MASSE, and IOAN I. BUCUR. "NEW SPECIES OF THE LOWER CRETACEOUS GENUS MATHERONIA MUNIER-CHALMAS (BIVALVE HIPPURITIDA) IN ROMANIA." Acta Palaeontologica Romaniae, no. 20 (1) (August 29, 2023): 3–15. http://dx.doi.org/10.35463/j.apr.2024.01.01.

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Barremian-lower Aptian requieniid rudists from the Southern Carpathians and the Apuseni Mountains, in Romania, are represented by four new species of the genus Matheronia Munier-Chalmas: Matheronia dacica, Matheronia nerae, Matheronia carinata and Matheronia silvaeregis. In the study stratigraphic interval these species possess a potential biostratigraphic value. Their evolution trough time is essentially characterized by shell size increase. Matheronia looks restricted to the North Mediterranean Tethyan margin and the new Romanian species are interpreted as markers of the Carpatho-Cimmerian rudist province.

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30

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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31

Martin-Chivelet, J., Jean Philip, and Guy Tronchetti. "Les Formations à Rudistes du Crétacé supérieur (Cénomanien moyen - Sénonien inférieur) du Domaine Prébétique (Sierra du Cuchillo, Région de Yecla, Espagne)." Géologie Méditerranéenne 17, no. 2 (1990): 139–51. http://dx.doi.org/10.3406/geolm.1990.1438.

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32

Breyer, Ralph, Fabrice Malartre, Serge Ferry, and Danièle Grosheny. "Développement de communautés à rudistes en milieu instable et contraignant: L'exemple du Coniacien de la vallée du Rhône (Sud-Est, France)." Geobios 30 (January 1997): 261. http://dx.doi.org/10.1016/s0016-6995(97)80100-3.

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33

Mercadier, C. G. L. "Paléoenvironnements et sédimentologie des formations récifales à Rudistes du Sénonien inférieur de Sainte-Anne d'Evenos, Massif du Gros-Cerveau (Var-S.E. France)." Géologie Méditerranéenne 12, no. 1 (1985): 65–121. http://dx.doi.org/10.3406/geolm.1985.1340.

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34

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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35

Negra, Mohamed El Hédi, and Jean-Paul Loreau. "Nanostructures comparées et diagénèse polyphasée des micrites dans des «mud-mounds» à Rudistes ; exemple du Sénonien supérieur du Jebel El Kebar, Tunisie centrale." Géologie Méditerranéenne 15, no. 2 (1988): 143–57. http://dx.doi.org/10.3406/geolm.1988.1401.

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36

Grosheny, Danièle, and Jean-François Babinot. "Paléoécologie des associations d'ostracodes d'une formation carbonatée à Rudistes en environnement péri-deltaïque: l'exemple du Santonien de la Cadière d'Azur (Sud-Est France)." Marine Micropaleontology 13, no. 4 (January 1989): 375–86. http://dx.doi.org/10.1016/0377-8398(89)90026-1.

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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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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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Goetz, Stefan A. "Larval Settlement and Ontogenetic Development of Hippuritella vasseuri (DOUVILLÉ) (Hippuritoidea, Bivalvia)." Geologia Croatica 56, no. 2 (2003): 123–31. http://dx.doi.org/10.4154/gc.2003.07.

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An entire bouquet of some 250 specimens of Hippuritella vasseuri(DOUVILLE) was mapped three dimensionally, based on ascending serial sections spaced at 1 mm, in order to evaluate the earliest ontogenetic development in hippuritid rudists. This method supplied more than 5000 cross-cuts through rudist specimens of different ontogenetic stages beginning from <1 mm larval spat, up to fully grown “senior” rudists. Based on near-commissure cross-sectionsof all ontogenetic stages, seven characteristic growth stages are distinguished, which show an increasing complexity of morphological features and a change in shell material composition. The complete transformation from a larval settling stage to adult-like morphology happened within the first 8–10 mm of vertical growth and comprised five stages. (1) The larval stage is defined by an undifferentiated aragonitic shell of about 0.3 mm diameter. (2) The “baby teeth” stageis still aragonitic but had a first hinge system. (3) The “first calcite”stage is characterized by the first occurrence of low magnesium calcite.(4) The “first pillar” stage shows weakly developed pillars and(5), the juvenile stage is of adult-like morphology but shows salient ornamentation and rapid diameter–size increase. Subsequent development is dominated by the adult stage growth progress (6) with morphological continuity prior to a short lasting senior stage (7) and demise.

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Saber, Shaban Ghanem, Yasser F. Salama, Robert W. Scott, Gouda Ismail Abdel-Gawad, and Mohamed Fouad Aly. "Cenomanian - Turonian rudist assemblages and sequence stratigraphy on the North Sinai carbonate shelf, Egypt." GeoArabia 14, no. 4 (October 1, 2009): 113–34. http://dx.doi.org/10.2113/geoarabia1404113.

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ABSTRACT The Middle to Upper Cenomanian Halal and Turonian Wata formations crop out at Gabal Minsherah, Gabal Yelleg and Gabal Maaza in the northern Sinai Peninsula, Egypt. This paper describes the rudist assemblages of the two formations in a sequence stratigraphic framework. Tabular thickets of conical to cylindrical elevator radiolitid rudists were the most common benthic type on the northern Cenomanian – Turonian Sinai shelf. The thickets were either single beds or multiple beds intercalated with marl or packstone. Most biostromes were laterally restricted and do not extend to nearby outcrops. The Cenomanian rudist biostromes are thin and composed mainly of several species of Radiolitidae and less common Caprinidae together with coralline sponges and benthic foraminifers. The Turonian rudist biostromes are composed of several species of Radiolitidae. The Cenomanian Halal Formation grades upward from basal quartz arenite into bioclastic-oolitic grainstone overlain by bioclastic packstone and wackestone. Dolomite beds are part of the highstand facies. The Formation is composed of transgressive-regressive Halal Sequences 1 and 2. The base of the overlying Wata Formation is Sequence Boundary 3 at the base of Wata Sequence 3, which is Lower to Middle Turonian. The sequence boundary between the Halal and the Wata is marl-on-marl with Upper Cenomanian ammonites overlain by a condensed interval with ammonites of several Lower Turonian zones that are particularly well exposed at Gabal Minsherah. The boundary is interpreted by graphic correlation as a million-year-long hiatus after which carbonate deposition resumed and low-diversity rudist assemblages recovered. The hiatus is correlated to the global anoxic event OAE 2. Following OAE 2 carbonate deposition resumed and produced microfacies similar to those of the Cenomanian. The Upper Turonian Wata Formation is composed of Wata Sequences 4 and 5.

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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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Vennin, Emmanuelle, and Marc Aurell. "Stratigraphie sequentielle de l'Aptien du sous-bassin de Galve (Province de Teruel, NE de l'Espagne)." Bulletin de la Société Géologique de France 172, no. 4 (July 1, 2001): 397–410. http://dx.doi.org/10.2113/172.4.397.

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Abstract A correlation is established in a north-south transect based on continuous outcrops. Considering the different reference surfaces and the geometry, three major depositional sequences can be distinguished which can be subdivided into a complex arrangement of parasequences. These third-order sequences are composed of a lower retrogradational and an upper progradational trends. The first sequence contains orbitolinid bioaccumulations in the retrogradational trend and oolitic-bioclastic shoals in the progradational trend. The second sequence exhibits, from bottom to top, a transgressive, a regressive and a forced-regressive trends. Ammonite-rich marls characterise the transgressive trend, whereas bioconstructions rich in coral-chaetetids-microbialites are abundant in both regressive and forced-regressive trends. The maximum flooding of this sequence is widely distributed across the whole Iberian platform. Finally, the third sequence shows the installation of homogeneous rudistid bioaccumulations in a retrogradational and a progradational trends. Each major sequence boundary marks a community replacement, whose respective fossil associations are dominated by (1) orbitolinids, (2) corals-microbialites, (3) corals-chaetetids-microbialites, and (4) rudists.

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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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Mahdi, Thamer A., Adnan A. M. Aqrawi, Andrew D. Horbury, and Govand H. Sherwani. "Sedimentological characterization of the mid-Cretaceous Mishrif reservoir in southern Mesopotamian Basin, Iraq." GeoArabia 18, no. 1 (January 1, 2013): 139–74. http://dx.doi.org/10.2113/geoarabia1801139.

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ABSTRACT The CenomanianÐEarly Turonian reservoirs of the Mishrif Formation of the Mesopotamian Basin hold more than one-third of the proven Iraqi oil reserves. Difficulty in predicting the presence of these mostly rudistic reservoir units is mainly due to the complex paleogeography of the Mishrif depositional basin, which has not been helped by numerous previous studies using differing facies schemes over local areas. Here we present a regional microfacies-based study that incorporates earlier data into a comprehensive facies model. This shows that extensive accumulation of rudist banks usually occurred along an exterior shelf margin of the basin along an axis that runs from Hamrin to Badra and southeast of that, with additional interior rudist margins around an intra-shelf basin to the southwest. Regional tectonism defined the accommodation sites during the platform development. Facies analysis allowed the recognition of 21 microfacies types and their transgressive-regressive cyclic stacking pattern. Sequence-stratigraphic analysis led to the recognition of three complete third-order sequences within the studied Mishrif succession. Eustatic sea-level changes were the primary control on this sequence development but local tectonics was important at the Cenomanian/Turonian boundary. Rudist biostromes are stacked as thicker shallowing-up cycles composed of several smaller-scale cycles. In places, smaller cycles are clearly shingled (stacked laterally). Iraq’s Mishrif sequences are thus analogous to coeval systems across the Arabian Plate in Oman, United Arab Emirates, offshore Saudi Arabia and Kuwait, southwest Iran and the Levant. Analysis of poroperm trends shows porosity increasing beneath sequence boundaries due to karstification and meteoric dissolution. The presence of interconnected vugs in grain-dominated fabric make the rudist biostromes the best reservoir units. Dissolution of aragonitic components of rudist shells was the most important diagenetic process that enhanced reservoir characteristics. The presence of rudist-bearing facies with their diagenetic overprint within regressive cycles is considered the primary factor in effective porosity development and distribution. As a result, because of depositional heterogeneities (facies type distribution and their 3-D geometries) and the influence of sequence boundaries on reservoir quality, each field shows unique geometrical combinations of pay zones, barriers and seals.

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Gourrat, Christian, Jean-Pierre Masse, and Peter W. Skelton. "Hypelasma salevensis (FAVRE, 1913) from the Upper Kimmeridgian of the French Jura, and the Origin of the Rudist Family Requieniidae." Geologia Croatica 56, no. 2 (2003): 139–48. http://dx.doi.org/10.4154/gc.2003.09.

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The requieniid rudist species ‘Matheronia’ salevensis FAVRE, first described from the Tithonian of Mont Salève, eastern France, is transferredto the genus Hypelasma PAQUIER, which is distinguished from Matheronia by possession of a posterior myophoral ledge in the left (attached) valve. Diminutive specimens from the Upper Kimmeridgianof the southern Jura are described and placed in this species.Hence, Hypelasma salevensis (FAVRE) is the stratigraphically oldest known member of the Family Requieniidae. It may also provideanother example of phyletic size increase among rudists. Revised diagnoses are given for the family, genus and species.The main distinction between the requieniids and the diceratids, from among which they arose, concerns the angle between the coiling axis of the left valve and the commissural plane. In diceratids, this angle is large, such that the often sub-equal umbones tend to twist outwards from the commissural plane, so avoiding mutual interference.In requieniids, by contrast, this angle is small, such that the prominent umbo of the left valve tends to coil across the commissuralplane in trochospiral to helicospiral fashion, while that of the right valve is suppressed in compensation, producing an exogyriform morphology. The requieniid modification of growth geometry, already present in H. salevensis, generated an extended basal surface on the flattened anterior wall of the left valve, implying specialized adaptationof these rudists as frictional or attached clingers.Requieniid ancestry should be sought among species of the pre-existing diceratid genera Epidiceras or Plesiodiceras, which also attached by the left valve. Although Plesiodiceras is favoured by its already more or less operculiform right valve and relatively small size, the derived condition of its posterior myophoral organisation is problematical. However, its juvenile shell shows some similarity of external form to H. salevensis, suggesting the possibility of paedomorphicevolution.

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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)

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Jablonski, David. "The rudists re-examined." Nature 383, no. 6602 (October 1996): 669–70. http://dx.doi.org/10.1038/383669a0.

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Gili, Eulalia, Antonio Obrador, Peter W. Skelton, and Gregorio López. "Las formaciones de rudistas de la plataforma de Sant Corneli (Cretácico Superior, unidad central surpirenaica)." Spanish Journal of Palaeontology 11, no. 3 (February 27, 2022): 172. http://dx.doi.org/10.7203/sjp.23938.

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En ambos flancos de! anticlinal de Sant Corneli, en la unidad central surpirenaica, afloran facies de plataforma calcárea de edad Santoniense. En este trabajo, hemos realizado un análisis paleoambiental detallado de la formación de rudistas y corales del flanco norte. La sección estudiada tiene una extensión de 6,8 Km de este a oeste y de 1,25 Km de norte a sur. En el oeste hay calcarenitas cuarzosas, ricas en miliolidos, transportadas desde el sudoeste. En el nordeste, en su parte mas externa, se desarrollo una formacion de rudistas y corales. Los ciclos que forman dicha formación empiezan con unas margas con abundantes corales en la base y asociaciones mixtas de corales y rudistas hacia arriba, que pasan a un tramo calcáreo constituido por agregados de hipurítidos. Los tramos inferiores de estas sucesiones representan condiciones marinas normales, relativamente más abiertas, y los litosomas de hipurítidos de la parte superior condiciones marinas más restringidas. Esta sucesión faunística se formo en respuesta a la somerización causada por la acumulación de sedimento. Del estudio detallado de uno de los litosomas de hipurítidos, se concluye que los agregados de hipurítidos carecían de estructura orgánica rígida y relieve original. Estos rudistas, por lo tanto, crecieron como pobladores de sedimentos, no como constructores arrecifales, en aguas restringidas de la parte superior de la plataforma. Allí, ocasionalmente eran perturbados por tempestades, y finalmente cubiertos por sedimentos bioclasticos transportados del margen de la plataforma.

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Sano, Shin-Ichi, Yasuhiro Iba, Peter W. Skelton, Jean-Pierre Masse, Yolanda M. Aguilar, and Tomoki Kase. "The evolution of canaliculate rudists in the light of a new canaliculate polyconitid rudist from the Albian of the Central Pacific." Palaeontology 57, no. 5 (January 31, 2014): 951–62. http://dx.doi.org/10.1111/pala.12096.

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Korbar, Tvrtko, and Antun Husinec. "Biostratigraphy of Turonian to (?)Coniacian Platform Carbonates: A Case Study from the Island of Cres (Northern Adriatic, Croatia)." Geologia Croatica 56, no. 2 (2003): 173–85. http://dx.doi.org/10.4154/gc.2003.11.

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The shallow marine carbonate deposits on the island of Cres, overlying deeper-water Cenomanian–Turonian limestones, are characterized by an assemblage of rudists, benthic foraminifera, and associated microfossils. The paucispecific character of the fossil association suggests deposition in shallow areas of a carbonate platform, with low current-energies and restricted circulation. Similar assemblages indicating similar palaeoenvironments, are common in the Upper Cretaceous deposits of the Adriatic Carbonate Platform and adjacent areas.The assemblage of rudists (hippuritids) and microfossils indicate the Turonian to (?)Coniacian age of the investigated carbonate succession. The biostratigraphic importance of the so-called “primitive” hippuritids within the micropalaeontologically poorly defined biostratigraphy of deposits of this age, is accentuated.

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Journal articles on the topic 'Rudistes'

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