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Journal articles on the topic 'Fossil Limestone Geology'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

DONOVAN, STEPHEN K. "Trace fossils and tropical karst." Geological Magazine 154, no. 1 (2016): 166–68. http://dx.doi.org/10.1017/s0016756815000965.

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AbstractTwo crinoid pluricolumnals from Permian rocks of Timor show similar patterns of external pitting. Platycrinitid sp. preserves circular, parabolic pits that do not cross-cut between columnals, some have raised rims and at least one columnal shows a growth deformity. These pits are interpreted as the trace fossil Oichnus paraboloides Bromley. Crinoid sp. indet. has particularly dense pits cross-cutting columnals on one side of the pluricolumnal only and extending onto the contiguous limestone; it is a Holocene microkarstic solution feature. Care must be taken to separate true bioerosive

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Raukas, Anto, and Wojciech Stankowski. "The Kaali crater field and other geosites of Saaremaa Island (Estonia): the perspectives for a geopark." Geologos 16, no. 1 (2010): 59–68. http://dx.doi.org/10.2478/v10118-010-0004-z.

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The Kaali crater field and other geosites of Saaremaa Island (Estonia): the perspectives for a geoparkThe Island of Saaremaa in Estonia offers highly spectacular geological features that belong to the most interesting in the Baltic Sea area. A unique geological monument on the island is the Kaali meteorite-crater field, formed by nine meteorite impacts. There are also attractive coastal cliffs, huge erratics, alvars (limestone areas covered by a very thin soil) and well-developed glacial and marine landforms. Limestone cliffs and shingle beaches abound with Silurian fossils and offer great opp

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Machado, Gil, Jindřich Hladil, Leona Koptíková, Paulo Fonseca, Fernando Rocha, and Arnošt Galle. "The Odivelas Limestone: evidence for a Middle Devonian reef system in western Ossa-Morena Zone (Portugal)." Geologica Carpathica 60, no. 2 (2009): 121–37. http://dx.doi.org/10.2478/v10096-009-0008-1.

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The Odivelas Limestone: evidence for a Middle Devonian reef system in western Ossa-Morena Zone (Portugal)The Odivelas Limestone constitutes one of the few records of Middle Devonian sedimentation in the western Ossa-Morena Zone. Although deformed and metamorphosed the limestones have an abundant fossil content which allows their positioning as late Eifelian/early Givetian in age and to relate the reef fauna with the typical Rhenish facies for the same time period. Magnetic susceptibility analysis was attempted and is in agreement with the biostratigraphy, but the limited extent of sections and

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Kölbl-Ebert, M., and B. J. Cooper. "Solnhofener Plattenkalk: a heritage stone of international significance from Germany." Geological Society, London, Special Publications 486, no. 1 (2019): 103–13. http://dx.doi.org/10.1144/sp486-2017-324.

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AbstractIn Bavaria (Germany), between Solnhofen and Kelheim, numerous quarries allow utilization of a thinly plated Upper Jurassic limestone known in German as the Solnhofener Plattenkalk and in English as Solnhofen Limestone. Here limestone slabs have been quarried for centuries and it is not necessary to cut the limestone with a saw as it can be split conveniently into thin and even slabs or sheets which are used for floor tiles and wall cladding. Thick slabs of especially fine quality have been used for lithography. This later utilization began in the late eighteenth century with lithograph

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SHEN, BING, SHUHAI XIAO, CHUANMING ZHOU, LIN DONG, JIEQIONG CHANG, and ZHE CHEN. "A new modular palaeopascichnid fossil Curviacus ediacaranus new genus and species from the Ediacaran Dengying Formation in the Yangtze Gorges area of South China." Geological Magazine 154, no. 6 (2017): 1257–68. http://dx.doi.org/10.1017/s001675681700036x.

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AbstractNon-biomineralizing Ediacaran macrofossils are rare in carbonate facies, but they offer valuable information about their three-dimensional internal anatomy and can broaden our view about their taphonomy and palaeoecology. In this study, we report a new Ediacaran fossil, Curviacus ediacaranus new genus and species, from bituminous limestone of the Shibantan Member of the Dengying Formation in the Yangtze Gorges area of South China. Curviacus is reconstructed as a benthic modular organism consisting of serially arranged and crescent-shaped chambers. The chambers are confined by chamber w

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ZHU, MAOYAN, and XIAN-HUA LI. "Introduction: from snowball Earth to the Cambrian explosion–evidence from China." Geological Magazine 154, no. 6 (2017): 1187–92. http://dx.doi.org/10.1017/s0016756817000644.

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The Neoproterozoic–Palaeozoic transition (NPT) around 600 Ma ago was a critical time interval when the Earth experienced fundamental change, manifested as climatic extremes – ‘snowball Earth’ – followed by the emergence and rapid diversification of animals – ‘Cambrian explosion’. How animals and environments co-evolved, and what caused these fundamental changes to the Earth system during the NPT, is a great scientific puzzle, which has been a rapidly developing frontier of interdisciplinary research between bio- and geosciences. South China preserves a complete stratigraphic succession of the

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Kramar, Sabina, Nina Žbona, Mojca Bedjanič, Ana Mladenović, and Boštjan Rožič. "Drenov Grič black limestone: a heritage stone from Slovenia." Geological Society, London, Special Publications 486, no. 1 (2019): 149–62. http://dx.doi.org/10.1144/sp486-2017-188.

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AbstractDrenov Grič black limestone is considered to be one of the most beautiful Slovenian natural stones due to its black colour interwoven with white veins. Over the centuries, it has been extracted from two major quarries located west of Ljubljana. One of these quarries has been declared a valuable natural feature of national importance and is protected as a natural monument. This well-stratified, Triassic (Carnian) micritic limestone occurs in 10–80 cm thick beds with thin marl interlayers. The limestone occasionally contains abundant fossil bivalves, gastropods and ostracods. It is relat

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de Wet, Carol B., Andrew P. de Wet, Linda Godfrey, et al. "Pliocene short-term climate changes preserved in continental shallow lacustrine-palustrine carbonates: Western Opache Formation, Atacama Desert, Chile." GSA Bulletin 132, no. 9-10 (2019): 1795–816. http://dx.doi.org/10.1130/b35227.1.

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Abstract Multiple climate proxies indicate episodic changes in moisture levels within an ∼1 Ma duration (early–mid Pliocene) interval. Limestones within the Opache Formation, Calama Basin, Atacama Desert region, Chile, contain evidence for wetter and drier periods on short time scales. Proxies include carbonate lithological changes, paleontology (stromatolites, oncolites, gastropods, ostracods and diatoms), O and C stable isotopes, geochemistry, and mineralogical changes (aragonite, calcite, Mg-calcite, dolomite and gypsum) throughout a 30 m stratigraphic section. Stromatolite fossil cyanobact

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Hoare, Gary, and Stephen K. Donovan. "New records of crinoids from Trearne Quarry SSSI (Mississippian, Lower Carboniferous), north Ayrshire." Scottish Journal of Geology 57, no. 1 (2021): sjg2020–012. http://dx.doi.org/10.1144/sjg2020-012.

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The Mississippian succession of Ayrshire, SW Scotland, is rich in fossil crinoids, albeit mainly preserved as fragments. Trearne Quarry is exceptional in yielding moderately common crinoid cups and thecae from certain horizons. To the two nominal taxa that have been documented hitherto, we add a further seven, all cladids with one exception. These species all come from the Blackhall Limestone of the Lower Limestone Formation (Visean, Mississippian). Nominal crinoid species identified from Trearne Quarry include Cladida: Rhabdocrinus scotocarbonarius (Wright), Ureocrinus bockschii (Geinitz), Ur

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Hussain, Salah. "Microfacies Characterizations and Paleoenvironment of Upper Part of Qamchuqa Formation from Chwarqauran Section, Sulaimaniyia Area, Kurdistan Region, Iraq." Iraqi Geological Journal 54, no. 1B (2021): 102–11. http://dx.doi.org/10.46717/igj.54.1b.9ms-2021-02-27.

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The Qamchuqa Formation was studied in Chwarqauran section, Sulaimanyia, Kurdistan region, Northeastern Iraq. The lithology of the formation contains limestone throughout the whole section except for one bed of dolomite at the Middle part. Twenty-four slides were prepared from 24 rock samples that were taken from this section to discriminate the petrography and fossil content. The petrographic study shows four main microfacies including lime mudstone, wackestone, packstone, and floatstone. Additionally, there are four sub microfacies: bioclast wackestone, miliolid wackestone, bioclast packstone

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Price, Gregory D., István Főzy, and András Galácz. "Carbon cycle history through the Middle Jurassic (Aalenian – Bathonian) of the Mecsek Mountains, Southern Hungary." Geologica Carpathica 69, no. 2 (2018): 117–27. http://dx.doi.org/10.1515/geoca-2018-0007.

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AbstractA carbonate carbon isotope curve from the Aalenian–Bathonian interval is presented from the Óbánya valley, of the Mecsek Mountains, Hungary. This interval is certainly less well constrained and studied than other Jurassic time slices. The Óbánya valley lies in the eastern part of the Mecsek Mountains, between Óbánya and Kisújbánya and provides exposures of an Aalenian to Lower Cretaceous sequence. It is not strongly affected by tectonics, as compared to other sections of eastern Mecsek of the same age. In parts, a rich fossil assemblage has been collected, with Bathonian ammonites bein

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Santos, Wellington Francisco Sá dos, Ismar De Souza Carvalho, and Antonio Carlos Sequeira Fernandes. "Mineração versus Paleontologia: uso e ocupação da serra do Veadinho em Peirópolis - Uberaba, Estado de Minas Gerais (Brasil)." Anuário do Instituto de Geociências 33, no. 2 (2010): 74–86. http://dx.doi.org/10.11137/2010_2_74-86.

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Peirópolis is a quarter located in Uberaba County (Minas Gerais State) that has an extraordinary paleontological site of the Late Cretaceous period. This area has many vertebrate fossils, mainly dinosaurs. A great amount of these fossils were found in sandstones of the serra do Veadinho. However, a lower limestone level was economically mining by European's immigrants between 1890 and 1960. In this period, the explotation was accomplished through manual exploration's techniques contributing to the discovery of fossils. Although, in 1987, the mineral explotation was conducted through mechanical

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Garassino, Alessandro, and Sergio Bravi. "Palaemon antonellae new species (Crustacea, Decapoda, Caridea) from the lower Cretaceous “Platydolomite” of Profeti (Caserta, Italy)." Journal of Paleontology 77, no. 3 (2003): 589–92. http://dx.doi.org/10.1017/s0022336000044279.

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The purpose of this study is to describe a new decapod crustacean from the Profeti region, Italy, and to interpret its palaeontological significance. Further, we include a taxonomic summary of fossil carideans. Macruran decapod crustaceans of Profeti occur flattened on bedding plane surfaces of light-brown lithographic limestone. Surrounding rock is poorly lithified, making preparation easy. The material examined, housed in the Geology Department of the University of Naples, consists of 53 specimens ascribed to Palaemon antonellae n. sp. (Infraorder Caridea Dana, 1852; family Palaemonidae Rafi

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Donovan, Stephen K., and Andrew Tenny. "Aspects of the palaeontology of Salthill Quarry, Clitheroe, Lancashire (Mississippian), NW England." Proceedings of the Yorkshire Geological Society 63, no. 3 (2020): pygs2020–003. http://dx.doi.org/10.1144/pygs2020-003.

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Salthill Quarry, Clitheroe, Lancashire (Mississippian, early Visean, Chadian) is a Site of Special Scientific Interest on the basis of its diverse fauna of invertebrates preserved in a Waulsortian mud mound setting. Important new specimens are described from the limestones and thin mudstones of the Hodder Mudstone Formation, on the southern margin of the quarry. A rare echinoid, archaeocidarid? gen. et sp. indet., is incomplete, but unusually retains the original curvature of the test. A columnal of Bystrowicrinus (col.) westheadi Donovan was derived from a radicular runner and has a dense clu

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Malak, Zaid A. "Stratigraphic and Microfacies Study of Kometan Formation (Upper Turonian-Lower Campanian), in the Dokan area, Northern Iraq." Iraqi Geological Journal 54, no. 1F (2021): 51–68. http://dx.doi.org/10.46717/igj.54.1f.6ms-2021-06-26.

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The Kometan Formation is widely distributed in the northern (Kurdistan region) and central Iraq. The studied area is located near the Dokan Dam, about 58 km., to the Northwest of the Sulaymaniyah city, Northeastern Iraq. The Kometan Formation is exposed on the southwest flank of the Sarah anticline. The formation consists of limestone and dolomitic limestone, which have cherts nodules throughout the formation. The Gulneri Formation is recorded below the Kometan Formation with unconformable contact, while at the top is bounded by the Shiranish Formation unconformably too. Three microfacies are

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Wan, Bin, Zhe Chen, Xunlai Yuan, et al. "A tale of three taphonomic modes: The Ediacaran fossil Flabellophyton preserved in limestone, black shale, and sandstone." Gondwana Research 84 (August 2020): 296–314. http://dx.doi.org/10.1016/j.gr.2020.04.003.

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Peryt, Danuta, and Tadeusz Peryt. "Environmental changes in the declining Middle Miocene Badenian evaporite basin of the Ukrainian Carpathian Foredeep (Kudryntsi section)." Geologica Carpathica 60, no. 6 (2009): 505–17. http://dx.doi.org/10.2478/v10096-009-0037-9.

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Environmental changes in the declining Middle Miocene Badenian evaporite basin of the Ukrainian Carpathian Foredeep (Kudryntsi section) The Kudryntsi section in West Ukraine documents a major environmental change from hypersaline to marine conditions during the Middle Miocene. There are very few (or no) specimens of foraminifers in samples of the siliciclastic series (4 m thick, with limestone intercalations) which occurs above the gypsum (and below the transgressive deposits) in the southern part of quarry. The limestone intercalations are first sparitic and microsparitic, and then become pel

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Lewis, David N., Stephen K. Donovan, and Paul Sawford. "Fossil echinoderms from the Carboniferous Limestone sea defence blocks at Barton-on-Sea, Hampshire, southern England." Proceedings of the Geologists' Association 114 (January 2003): 307–17. http://dx.doi.org/10.1016/s0016-7878(03)80031-7.

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NATALICCHIO, M., J. PECKMANN, D. BIRGEL, and S. KIEL. "Seep deposits from northern Istria, Croatia: a first glimpse into the Eocene seep fauna of the Tethys region." Geological Magazine 152, no. 3 (2014): 444–59. http://dx.doi.org/10.1017/s0016756814000466.

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AbstractThree isolated limestone deposits and their fauna are described from a middle Eocene Flysch succession in northwestern Istria, Croatia. The limestones are identified as ancient methane-seep deposits based on fabrics and characteristic mineral phases, δ13Ccarbonatevalues as low as −42.2 ‰ and13C-depleted lipid biomarkers indicative of methane-oxidizing archaea. The faint bedding of the largest seep deposit, the great dominance of authigenic micrite over early diagenetic fibrous cement, as well as biomarker patterns indicate that seepage was diffusive rather than advective. Apart from me

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Häggström, Therese, and Birger Schmitz. "Distribution of extraterrestrial chromite in Middle Ordovician Komstad Limestone in the Killeröd quarry, Scania, Sweden." Bulletin of the Geological Society of Denmark 55 (March 11, 2007): 37–58. http://dx.doi.org/10.37570/bgsd-2007-55-03.

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Sediment-dispersed extraterrestrial chromite grains (63–355 µm) have been recovered in a sectionacross the Arenig-Llanvirn transition in the Killeröd quarry in southeastern Scania. Previous studies of the same stratigraphic interval in the Orthoceratite Limestone at Kinnekulle, ca. 350 km to the north in Västergötland, have shown a two orders of magnitude increase in extraterrestrial chromite beginning close to the Arenig-Llanvirn boundary. The stratigraphic distribution and abundance trends of extraterrestrial chromite are essentially identical at Killeröd and Kinnekulle. In the Killeröd sect

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Underwood, Charlie J. "Faunal transport within event horizons in the British Upper Silurian." Geological Magazine 131, no. 4 (1994): 485–98. http://dx.doi.org/10.1017/s0016756800012115.

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AbstractMany marine fossil concentrations are considered the result of episodic sedimentological events, and in particular those due to storms. Most storm or tempestite concentrations are identified as autochthonous or parautochthonous assemblages created by a variety of winnowing processes within shallow water environments. In contrast, samples described here from both a ‘shelf’ and a ‘basinal’ setting within the Ludlow (Upper Silurian) succession of the Welsh Basin reveal the presence of a biota transported by tempestite activity into a setting dominated by a more offshore biota. Tempestite

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Voldman, Gustavo G., Juan L. Alonso, Luis P. Fernández, et al. "Tips on the SW-Gondwana margin: Ordovician conodont-graptolite biostratigraphy of allochthonous blocks in the Rinconada mélange, Argentine Precordillera." Andean Geology 45, no. 3 (2018): 399. http://dx.doi.org/10.5027/andgeov45n3-3095.

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The Rinconada Formation is a mélange that crops out in the eastern margin of the Argentine Precordillera, an exotic terrane accreted to Gondwana in Ordovician times. Its gravity-driven deposits have been studied by means of conodont and graptolite biostratigraphy, and complemented with stratigraphic analyses. 46 rock samples (85 kg total weight) were obtained from blocks of limestones and of carbonate-cemented quartz-arenites, and from limestone clasts included in conglomerate blocks and debrites. 16 of these samples were productive after standard laboratory acid procedures, yielding 561 conod

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LI, DA, HONG-FEI LING, SHAO-YONG JIANG, et al. "New carbon isotope stratigraphy of the Ediacaran–Cambrian boundary interval from SW China: implications for global correlation." Geological Magazine 146, no. 4 (2009): 465–84. http://dx.doi.org/10.1017/s0016756809006268.

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AbstractThe Yangtze Platform preserves relatively thick carbonate successions and excellent fossil records across the Ediacaran–Cambrian boundary interval. The intensely studied Meishucun section in East Yunnan was one of the Global Stratotype Section candidates for the Precambrian–Cambrian boundary. However, depositional breaks were suspected in the section and the first appearance of small shelly fossils could not be verified. The Laolin section located in NE Yunnan is more continuous and shows great potential for global correlation of carbon isotope features across the Precambrian–Cambrian

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Hearty, Paul J., and Darrell S. Kaufman. "Whole-Rock Aminostratigraphy and Quaternary Sea-Level History of the Bahamas." Quaternary Research 54, no. 2 (2000): 163–73. http://dx.doi.org/10.1006/qres.2000.2164.

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The surficial geology of the tectonically stable Bahamian archipelago preserves one of the most complete records of middle to late Quaternary sea-level-highstand cycles in the world. However, with the exception of deposits from marine isotope substage (MIS) 5e, fossil corals for radiometric dating of this rich stratigraphic sequence are rare. This study utilizes the previously published, independent lithostratigraphic framework as a testing ground for amino acid racemization in whole-rock limestone samples. At least six limestone–soil couplets provide a relative age sequence of events that enc

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Löfgren, A. "Conodonts from the lower Ordovician at Hunneberg, south-central Sweden." Geological Magazine 130, no. 2 (1993): 215–32. http://dx.doi.org/10.1017/s0016756800009870.

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AbstractSix sections through lower Ordovician shale and limestone at Hunneberg have been sampled for conodonts. Forty-nine limestone horizons and 34 shale surface samples yielded over 40000 conodont elements. The degree of biostratigraphic resolution permitted further subdivision of the post-Tremadoc Paroistodus proteus Zone into four successive intervals. Preliminary studies of coeval rocks in other areas of Sweden show that this subdivision applies elsewhere as well. Comparison with published sections from, for example, Newfoundland, Estonia and Kazakhstan indicates that the fourfold subdivi

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LANDING, ED, and STEPHEN R. WESTROP. "Late Cambrian (middle Furongian) shallow-marine dysoxic mudstone with calcrete and brachiopod–olenid–Lotagnostusfaunas in Avalonian Cape Breton Island, Nova Scotia." Geological Magazine 152, no. 6 (2015): 973–92. http://dx.doi.org/10.1017/s001675681400079x.

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AbstractThe common belief that organic-rich mudstones formed in quiescent, distal settings is further weakened by study of an upper Cambrian (Leptoplastus– lowerPelturasuperzones) succession in the Chesley Drive Group in Avalonian Cape Breton Island that is comparable to Alum Shale successions in Baltica. Dramatic sea-level (likely eustatic) changes are now recognized by punctuation of deposition of shallow, wave-influenced black mudstone with brachiopod (Orusia lenticularis) and olenid trilobite-bearing limestones by offlap and formation of a subaerially cemented calcrete-clast conglomerate.

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Moreau, Jean-David, Louis Baret, Gérard Lafaurie, and Carmela Chateau-Smith. "Terrestrial plants and marine algae from the Late Jurassic lithographic limestone of the Causse Méjean (Lozère, southern France)." Bulletin de la Société Géologique de France 187, no. 2 (2016): 121–27. http://dx.doi.org/10.2113/gssgfbull.187.2.121.

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Abstract A new Late Jurassic flora was discovered in the fossiliferous lithographic limestone of the Causse Méjean, Lozère (southern France). It consists of the first Kimmeridgian/Tithonian plants from this area. Fossil plants are represented by megaremains preserved as impressions. This flora shows a co-occurrence of terrestrial plants and marine algae. The land plants include vegetative remains ascribed to bennettitaleans (Zamites Brongniart, 1828), conifers (Brachyphyllum Brongniart, 1828), and pteridosperms (Cycadopteris Zigno, 1853). Marine algae were ascribed to dasyclads (Goniolina D’Or

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ERIKSSON, MATS E., and ÅSA M. FRISK. "Polychaete palaeoecology in an early Late Ordovician marine astrobleme of Sweden." Geological Magazine 148, no. 2 (2010): 269–87. http://dx.doi.org/10.1017/s0016756810000579.

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AbstractThe post-impact Dalby Limestone (Kukruse; Upper Ordovician) of the Tvären crater, southeastern Sweden, has been analysed with regards to polychaetes, as represented by scolecodonts. A palaeoecological succession is observed in the Tvären-2 drill core sequence, as the vacant ecospace was successively filled by a range of benthonic, nektonic and planktonic organisms. Scolecodonts belong to the first non-planktonic groups to appear and constitute one of the most abundant fossil elements. The polychaete assemblage recorded has an overall composition characteristic of that of the Upper Ordo

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WANG, YANBIN, DETING YANG, JUAN HAN, LITING WANG, JIANXIN YAO, and DUNYI LIU. "The Triassic U–Pb age for the aquatic long-necked protorosaur of Guizhou, China." Geological Magazine 151, no. 4 (2014): 749–54. http://dx.doi.org/10.1017/s001675681400003x.

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AbstractThe ancient marine limestone beds of the upper part of the Guanling Formation, Panxian County, Guizhou Province, SW China, yielded a wide range of high-diversity well-preserved marine reptiles such as the fully aquatic protorosaur with an extremely long neckDinocephalosaurus orientalis, the oldest mixosaurid ichthyosaurs and lariosaurs. However, there is no precise isotopic age to study the intriguing origin, evolution and emigration history of the important fauna. We report a sensitive high-resolution ion microprobe (SHRIMP) U–Pb zircon age for a volcanic tuff bed within the upper par

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S. Intan, M. Fadhlan. "Geologi Situs Paleolitik Pacitan Bagian Timur Kabupaten Pacitan, Provinsi Jawa Timur." AMERTA 26, no. 1 (2020): 1–22. http://dx.doi.org/10.24832/amt.v26i1.1-22.

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Abstract. The Geology of the Paleolithic Site of the Eastern Part of Pacitan, Pacitan Regency, East Java Province. The Paleolithic Site of the Eastern Part of Pacitan is located at Km-10 to Km-18 east of the city of Pacitan to the direction of Trenggalek regency. It covers three main rivers, namely Kedunggamping (Padi) River, Ngrendeng-Tulakan River, and Lorog River. The site has lowland, weak wavy, strong wavy, and karst morphological units. It is situated at an elevation of O - 900 m above sea level. The three rivers that flow in this area are old and old-mature stadium ones, with observable

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Khomentovsky, V. V., and A. S. Gibsher. "The Neoproterozoic–lower Cambrian in northern Govi-Altay, western Mongolia: regional setting, lithostratigraphy and biostratigraphy." Geological Magazine 133, no. 4 (1996): 371–90. http://dx.doi.org/10.1017/s001675680000755x.

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AbstractThis paper provides a framework for the stratigraphy and correlation of key sections through the Neoproterozoic–lower Cambrian of the Govi-Altay area, western Mongolia, studied by members of IGCP Project 303. Dzabkhan Formation volcanic rocks at the base of the succession are suggested to have formed during rifting of the Baydrik–Tarbagatay microcontinent in the Baykalian interval (c. 850–650 Ma). Pre-Vendian accretion transformed this rift and adjacent microcontinental fragments into a marginal marine back-arc basin, in which accumulated relatively uninterrupted Neoproterozoic and ear

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Bujtor, László, Richárd Albrecht, Csaba Farkas, Bertalan Makó, Dávid Maróti, and Ákos Miklósy. "Kimmeridgian and early Tithonian cephalopods from the Kisújbánya Limestone Formation, Zengővárkony (Mecsek Mountains, southern Hungary), their faunal composition, palaeobiogeographic affinities, and taphonomic character." Carnets de géologie (Notebooks on geology) 21, no. 13 (2021): 265–314. http://dx.doi.org/10.2110/carnets.2021.2113.

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A new collection at Zengővárkony (Mecsek Mountains, Hungary) provided a rich and diverse but poorly preserved cephalopod-dominated fossil assemblage representing the Kimmeridgian and the lower Tithonian. The material came from mixed scree, soil, and amongst roots affected by weathering processes having been exposed to the elements for a long time. The nautiloid Pseudaganides strambergensis is the first record from the Mecsek Mountains. Due to the weathering, the ammonite fauna consists of mainly fragmentary and dissolved individuals that comprises 528 specimens belonging to 34 species and 30 g

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MANDA, ŠTĚPÁN, PETR ŠTORCH, LADISLAV SLAVÍK, JIŘÍ FRÝDA, JIŘÍ KŘÍŽ, and ZUZANA TASÁRYOVÁ. "The graptolite, conodont and sedimentary record through the late Ludlow Kozlowskii Event (Silurian) in the shale-dominated succession of Bohemia." Geological Magazine 149, no. 3 (2011): 507–31. http://dx.doi.org/10.1017/s0016756811000847.

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AbstractThe shale-dominated hemipelagic succession exposed in the southwestern part of the Prague Synform preserves the most complete Ludfordian graptolite record so far encountered from peri-Gondwanan Europe. Four graptolite biozones – theNeocucullograptus inexpectatus,Nc. kozlowskii,Pseudomonoclimacis latilobus–Slovinograptus balticusandPristiograptus fragmentalisbiozones – are recognized in the middle and late Ludfordian, between theBohemograptus tenuisBiozone and the base of the Pridoli Series. Conodont occurrences are restricted to scattered limestone beds, but enable tentative integratio

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Carpenter, Kenneth, and Eugene Lindsey. "Redefining the Upper Jurassic Morrison Formation in Garden Park National Natural Landmark and vicinity, eastern Colorado: Geology of the Intermountain West." Geology of the Intermountain West 6 (January 31, 2019): 1–30. http://dx.doi.org/10.31711/giw.v6.pp1-30.

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The Garden Park National Natural Landmark (GPNNL) is north of Cañon City, Colorado, and encompasses all of the major historical dinosaur quarries of the Upper Jurassic Morrison Formation in this area. The formation there can be divided into the lower redefined Ralston Creek Member and an upper unnamed member. The Morrison Formation is bracketed below by the J-5 unconformity and above by the K-1 unconformity. The Ralston Creek Member is composed of up to 55 m of arkosic conglomerate, sandstone, siltstone, and gypsum conformably underlying the unnamed member. Fossil fishes previously used to inf

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Carpenter, Kenneth, and Eugene Lindsey. "Redefining the Upper Jurassic Morrison Formation in Garden Park National Natural Landmark and vicinity, eastern Colorado: Geology of the Intermountain West." Geology of the Intermountain West 6 (January 25, 2019): 1–30. http://dx.doi.org/10.31711/giw.v6i0.33.

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The Garden Park National Natural Landmark (GPNNL) is north of Cañon City, Colorado, and encompasses all of the major historical dinosaur quarries of the Upper Jurassic Morrison Formation in this area. The formation there can be divided into the lower redefined Ralston Creek Member and an upper unnamed member. The Morrison Formation is bracketed below by the J-5 unconformity and above by the K-1 unconformity. The Ralston Creek Member is composed of up to 55 m of arkosic conglomerate, sandstone, siltstone, and gypsum conformably underlying the unnamed member. Fossil fishes previously used to inf

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Gibson, Timothy M., Sarah Wörndle, Peter W. Crockford, T. Hao Bui, Robert A. Creaser, and Galen P. Halverson. "Radiogenic isotope chemostratigraphy reveals marine and nonmarine depositional environments in the late Mesoproterozoic Borden Basin, Arctic Canada." GSA Bulletin 131, no. 11-12 (2019): 1965–78. http://dx.doi.org/10.1130/b35060.1.

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Abstract The ca. 1050 Ma Bylot Supergroup in Arctic Canada is one of the best-preserved archives of late Mesoproterozoic geochemistry and biology and offers evidence that this period of Earth history may have been more biogeochemically dynamic than previously appreciated. The Bylot Supergroup was deposited in the Borden Basin and is the most thoroughly studied stratigraphic succession from a series of broadly contemporaneous late Mesoproterozoic intracratonic basins known as the Bylot basins. This ∼6-km-thick mixed carbonate-siliciclastic succession has undergone minimal postdepositional defor

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Kovács, Zoltán, and Zoltán Vicián. "Middle Miocene Conoidea (Neogastropoda) assemblage of Letkés (Hungary), Part II. (Borsoniidae, Cochlespiridae, Clavatulidae, Turridae, Fusiturridae)." Földtani Közlöny 151, no. 2 (2021): 137. http://dx.doi.org/10.23928/foldt.kozl.2021.151.2.137.

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Five conoidean families (Borsoniidae, Cochlespiridae, Clavatulidae, Turridae, Fusiturridae) are described from the early Badenian (early Middle Miocene) gastropod assemblage of Letkés (N Pannonian Basin, Hungary). The clayey sand deposits of the locality represent the Pécsszabolcs Member of the Lajta Limestone Formation, and contain the richest Badenian fossil marine mollusk assemblage of Hungary. 41 conoidean species are recorded and illustrated; Clavatula hirmetzli n. sp., Clavatula santhai n. sp., Clavatula szekelyhidiae n. sp., Perrona harzhauseri n. sp. and Perrona nemethi n. sp. are desc

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Oliveira, Gustavo Ribeiro de. "Aspectos tafonômicos de Testudines da formação Santana (Cretáceo Inferior), Bacia do Araripe, Nordeste do Brasil." Anuário do Instituto de Geociências 30, no. 1 (2007): 83–93. http://dx.doi.org/10.11137/2007_1_83-93.

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Araripe Basin is worldwide famous by diverse and exquisitely well preserved fossil assemblages in Santana Formation. This lithostratigraphic unit is subdivided into three members: Crato, Ipubi and Romualdo. Up to date six species of turtles are known: Araripemys barretoi Price, 1973; Santanachelys gaffneyi, Hirayama, 1998; Brasilemys josai Lapparent de Broin, 2000; Cearachelys placidoi Gaffney, Campos & Hirayama, 2001, Euraxemys essweini Gaffney, Tong & Meylan, 2006 and Caririemys violetae Oliveira & Kellner, 2007. Taphonomical features of turtles from Crato and Romualdo members ar

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WEEDON, GRAHAM P., HUGH C. JENKYNS, and KEVIN N. PAGE. "Combined sea-level and climate controls on limestone formation, hiatuses and ammonite preservation in the Blue Lias Formation, South Britain (uppermost Triassic – Lower Jurassic)." Geological Magazine 155, no. 5 (2017): 1117–49. http://dx.doi.org/10.1017/s001675681600128x.

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AbstractLithostratigraphic and magnetic-susceptibility logs for four sections in the Blue Lias Formation are combined with a re-assessment of the ammonite biostratigraphy. A Shaw plot correlating the West Somerset coast with the Devon/Dorset coast at Lyme Regis, based on 63 common biohorizon picks, together with field evidence, demonstrate that intra-formational hiatuses are common. Compared to laminated shale deposition, the climate associated with light marl is interpreted as both drier and stormier. Storm-related non-deposition favoured initiation of limestone formation near the sediment–wa

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Bond, David P. G., Paul B. Wignall, and Stephen E. Grasby. "The Capitanian (Guadalupian, Middle Permian) mass extinction in NW Pangea (Borup Fiord, Arctic Canada): A global crisis driven by volcanism and anoxia." GSA Bulletin 132, no. 5-6 (2019): 931–42. http://dx.doi.org/10.1130/b35281.1.

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Abstract Until recently, the biotic crisis that occurred within the Capitanian Stage (Middle Permian, ca. 262 Ma) was known only from equatorial (Tethyan) latitudes, and its global extent was poorly resolved. The discovery of a Boreal Capitanian crisis in Spitsbergen, with losses of similar magnitude to those in low latitudes, indicated that the event was geographically widespread, but further non-Tethyan records are needed to confirm this as a true mass extinction. The cause of this crisis is similarly controversial: While the temporal coincidence of the extinction and the onset of volcanism

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Kaal, Joeri, Virginia Martínez-Pillado, Antonio Martínez Cortizas, et al. "Bacteria, guano and soot: Source assessment of organic matter preserved in black laminae in stalagmites from caves of the Sierra de Atapuerca (N Spain)." International Journal of Speleology 50, no. 2 (2021): 121–35. http://dx.doi.org/10.5038/1827-806x.50.2.2382.

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Speleothems are a recognized source of paleoclimatic information, but their value as a source of signals from human activities in caves with an archaeological record has rarely been explored. Previous studies of speleothems in the Sierra de Atapuerca karst system (Burgos, northern Spain) revealed an important human fossil record, provided information about human activities in and around these caves, and the impacts on their natural environment. The present study reports the results of molecular characterization of dark-colored laminae from the stalagmites Ilargi (Galería de las Estatuas) and G

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Munkhjargal, A., P. Königshof, J. A. Waters, et al. "The Mandalovoo–Gurvansayhan terranes in the southern Gobi of Mongolia: new insights from the Bayankhoshuu Ruins section." Palaeobiodiversity and Palaeoenvironments 101, no. 3 (2021): 755–80. http://dx.doi.org/10.1007/s12549-020-00471-y.

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AbstractThe Bayankhoshuu Ruins section in southern Mongolia is characterized by strongly thrusted and folded sequences. Overall, three sections ranging from Ordovician to Carboniferous rocks were studied. Facies analysis combined with stratigraphic data provide improved lithostratigraphic descriptions of Palaeozoic successions in the Mushgai region. The overall marine sedimentary sequence is punctuated by volcanic rocks–basaltic lava of Silurian and Middle Devonian age and volcaniclastic bentonite and tuff in the Middle to Late Devonian and Mississippian suggesting an island arc setting. The M

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Quilty, Patrick G., Juan Manuel Lirio, and David Jillett. "Stratigraphy of the Pliocene Sørsdal Formation, Marine Plain, Vestfold Hills, East Antarctica." Antarctic Science 12, no. 2 (2000): 205–16. http://dx.doi.org/10.1017/s0954102000000262.

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The Sørsdal Formation and one member, Graveyard Sandstone Member constitute a sedimentary sequence covering approximately 10 km2 of Marine Plain, Vestfold Hills, East Antarctica. The new Formation consists dominantly of friable diatomaceous siltstone and sandstone with dark limestone lenses. It is in situ, essentially horizontal, 7.2 m thick in its type section and lies less than 25 m a.s.l. Graveyard Sandstone Member occurs near the top of the formation, is highly lithified sandy diamictite, 30–50 cm thick and widespread through the Marine Plain region. Using diatoms, the Formation is Early P

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Johnson, Markes E., Erlend M. Johnson, Rigoberto Guardado-France, and Jorge Ledesma-Vázquez. "Holocene Hurricane Deposits Eroded as Coastal Barriers from Andesite Sea Cliffs at Puerto Escondido (Baja California Sur, Mexico)." Journal of Marine Science and Engineering 8, no. 2 (2020): 75. http://dx.doi.org/10.3390/jmse8020075.

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Previous studies on the role of hurricanes in Mexico’s Gulf of California examined coastal boulder deposits (CBDs) eroded from limestone and rhyolite sea cliffs. Sedimentary and volcanic in origin, these lithotypes are less extensively expressed as rocky shores than others in the overall distribution of gulf shores. Andesite that accumulated as serial volcanic flows during the Miocene constitutes by far the region’s most pervasive rocky shores. Here, we define a subgroup of structures called barrier boulder deposits (BBDs) that close off lagoons as a result of lateral transport from adjacent r

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Fernández-López, Sixto Rafael. "Taphonomic analysis and sequence stratigraphy of the Albarracinites beds (lower Bajocian, Iberian range, Spain). An example of shallow condensed section." Bulletin de la Société Géologique de France 182, no. 5 (2011): 405–15. http://dx.doi.org/10.2113/gssgfbull.182.5.405.

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Abstract Several ammonite fossil assemblages from Sierra de Albarracín (Teruel, Castilian Branch) contain abundant specimens of the Ovale and Laeviuscula zones (lower Bajocian, Middle Jurassic), including microconchs and macroconchs of the characteristic genus Albarracinites. Over 1500 ammonites from the type horizon of the species A. albarraciniensis, in the outcrop of Masada Toyuela, have been studied. Ammonites are commonly preserved as phosphatized, calcareous, concretionary internal moulds (mean size = 50.5 mm) of unflattened shells, partially or completely filled with relatively heterog

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KULAGINA, ELENA, SVETLANA NIKOLAEVA, VLADIMIR PAZUKHIN, and NATALIYA KOCHETOVA. "Biostratigraphy and lithostratigraphy of the Mid-Carboniferous boundary beds in the Muradymovo section (South Urals, Russia)." Geological Magazine 151, no. 2 (2013): 269–98. http://dx.doi.org/10.1017/s0016756813000599.

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AbstractThe uninterrupted succession of the Mississippian–Pennsylvanian boundary beds in the Muradymovo section in the South Urals contains diverse fossils and has a high correlative potential. The Muradymovo section is located in the Zilair Megasynclinorium (ZM), which belongs to the West Uralian Subregion and displays carbonate-siliciclastic deep-water facies of the Bukharcha Formation, which is partly Serpukhovian (Kosogorian, Protvian and Yuldybaevian) and partly Bashkirian (Syuranian). In the southern ZM, the lower part of the formation contains argillaceous carbonates with beds of shale

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Ślączka, Andrzej, M. Gasiñski, Marta Bąk, and Godfrid Wessely. "The clasts of Cretaceous marls in the conglomerates of the Konradsheim Formation (Pöchlau quarry, Gresten Klippen Zone, Austria)." Geologica Carpathica 60, no. 2 (2009): 151–64. http://dx.doi.org/10.2478/v10096-009-0010-7.

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The clasts of Cretaceous marls in the conglomerates of the Konradsheim Formation (Pöchlau quarry, Gresten Klippen Zone, Austria)Investigations were carried out on foraminiferids and radiolaria from redeposited clasts within the conglomerates of the Konradsheim Formation (Gresten Klippen Zone) in the area of the Pöchlau hill, east of Maria Neustift. These shales and marls are of Middle to Late Jurassic and Early Cretaceous age. In the latter clasts, foraminiferal assemblages withTritaxiaex gr.gaultinaas well as radiolaria speciesAngulobracchia portmanniBaumgartner,Dictyomitra communis(Squinabol

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Orchard, M. J., F. Cordey, L. Rui, et al. "Biostratigraphic and biogeographic constraints on the Carboniferous to Jurassic Cache Creek Terrane in central British Columbia." Canadian Journal of Earth Sciences 38, no. 4 (2001): 551–78. http://dx.doi.org/10.1139/e00-120.

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Conodonts, radiolarians, foraminiferids, and corals provide constraints on the geology and tectonics of the Nechako region. They also support the notion that the Cache Creek Terrane is allochthonous with respect to the North American craton. The 177 conodont collections, assigned to 20 faunas, range in age from Bashkirian (Late Carboniferous) to Norian (Late Triassic); 70 radiolarian collections representing 12 zones range from Gzhelian (Late Carboniferous) to Toarcian (Early Jurassic); 335 collections assigned to 11 fusulinacean assemblages (with associated foram-algal associations) range fro

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Brasier, M. D., G. Shields, V. N. Kuleshov, and E. A. Zhegallo. "Integrated chemo- and biostratigraphic calibration of early animal evolution: Neoproterozoic–early Cambrian of southwest Mongolia." Geological Magazine 133, no. 4 (1996): 445–85. http://dx.doi.org/10.1017/s0016756800007603.

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AbstractFive overlapping sections from the thick Neoproterozoic to early Cambrian sediments of western Mongolia were analysed to yield a remarkable carbon-isotope, strontium-isotope and small shellyfossil (SSF) record. Chemostratigraphy suggests that barren limestones of sequences 3 and 4, which lie above the two Maikhan Uul diamictites, are post-Sturtian but pre-Varangerian in age. Limestones and dolomites of sequence 5, withBoxonia grumulosa, have geochemical signatures consistent with a post-Varangerian (Ediacarian) age. A major negative δ13C anomaly (feature ‘W’) in sequence 6 lies a short

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WOLSKA, Anna, Agnieszka CIUREJ, and Szymon KOWALIK. "THE USE OF A NATURAL RESOURCE IN THE INTERIOR DESIGN OF THE MAIN BUILDING OF THE PEDAGOGICAL UNIVERSITY OF CRACOW." Biuletyn Państwowego Instytutu Geologicznego 472, no. 472 (2018): 339–48. http://dx.doi.org/10.5604/01.3001.0012.6878.

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The paper presents an interesting decorative flooring solution from 1973 on the ground and first floors of the main building of the Pedagogical University of Cracow, named after the Commission of National Education. This flooring is composed of irregular, variably coloured natural stone slabs: the so-called Holy Cross Mountains „marbles”. They represent several rock types from limestone quarries near Chęciny, including mainly Bolechowice, but also Szewce, Łabędziów and Jaźwica. These rocks are traditionally called marbles. However, in fact, petrographically, they are not metamorphic rocks, but

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