Results 241 to 250 of about 29,214 (295)
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Stratigraphy and Geological Correlation, 2006
Changes in morphological diversity and taxonomic composition of late Albian-early Turonian foraminiferal and radiolarian assemblages from the northern Peri-Tethys are considered. Several stages are defined in evolution of planktonic foraminifers: polytaxic (Albian-Cenomanian), oligotaxic (Cenomanian-Turonian boundary period), and polytaxic (Turonian ...
V. S. Vishnevskaya +3 more
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Changes in morphological diversity and taxonomic composition of late Albian-early Turonian foraminiferal and radiolarian assemblages from the northern Peri-Tethys are considered. Several stages are defined in evolution of planktonic foraminifers: polytaxic (Albian-Cenomanian), oligotaxic (Cenomanian-Turonian boundary period), and polytaxic (Turonian ...
V. S. Vishnevskaya +3 more
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The mid-Cenomanian Event: prelude to OAE 2
Palaeogeography, Palaeoclimatology, Palaeoecology, 2003A detailed synthesis of litho- and biostratigraphic investigations of the Cenomanian pelagic limestones of the Scaglia Bianca Formation in the Umbria–Marche Basin shows that the Bonarelli Level, which is the regional sedimentary expression of the OAE 2, represents the climax of a ∼2 Myr-long cycle of black shale deposition that began in the mid ...
COCCIONI, RODOLFO, GALEOTTI, SIMONE
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Palaeogeography, Palaeoclimatology, Palaeoecology, 1974
Abstract A major micropalaeontological non-sequence in the British Cenomanian correlates with similar features elsewhere in Europe and in North America. Comparison of these results with deep-sea sedimentary cores in the North Atlantic and Pacific indicates that this non-sequence sequence is widespread and probably indicates a major eustatic episode ...
M.B. Hart, D.H. Tarling
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Abstract A major micropalaeontological non-sequence in the British Cenomanian correlates with similar features elsewhere in Europe and in North America. Comparison of these results with deep-sea sedimentary cores in the North Atlantic and Pacific indicates that this non-sequence sequence is widespread and probably indicates a major eustatic episode ...
M.B. Hart, D.H. Tarling
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Ontogeny and phylogeny of Upper Cenomanian rotaliporids (Foraminifera)
Marine Micropaleontology, 2008The fossil record of planktonic foraminifera is a key source of data on the evolution of marine plankton. One of the most distinctive groups of Cretaceous foraminifera, the rotaliporids, widely used as a stratigraphic index, has always been considered to be a monophyletic clade. New data on the coiling direction and persistent morphological features of
Desmares, Delphine +2 more
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Cenomanian Trocholinas from Nigeria
Micropaleontology, 1968Limestones belonging to the Cenomanian Odukpani formation are exposed in southeastern Nigeria, and in them a new species of foraminifer, Trocholina odukpaniensis, as well as fragments of algae and mollusk shells, are preserved as calcite casts. Revision of published material necessitates a new diagnosis of the genus.
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Geological Magazine, 1902
That the Upper Cretaceous deposits overlap those of the Lower Cretaceous series, and extend over much larger areas throughout the whole of western and central Europe, are facts which have long been familiar to all European geologists. There has, however, been a tendency, especially in France, to imagine that the subsidence to which the overlap is due ...
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That the Upper Cretaceous deposits overlap those of the Lower Cretaceous series, and extend over much larger areas throughout the whole of western and central Europe, are facts which have long been familiar to all European geologists. There has, however, been a tendency, especially in France, to imagine that the subsidence to which the overlap is due ...
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Cenomanian cheilostome bryozoans from Devon, England
Annales de Paléontologie, 2017Abstract The Cenomanian witnessed a spectacular evolutionary radiation of cheilostome bryozoans, both in terms of species diversity and morphological disparity. However, Cenomanian cheilostome faunas are inadequately known. Twelve species of cheilostome bryozoans are here described from the Cenomanian Beer Head Limestone Formation of SE Devon ...
Paul D. Taylor, Silviu O. Martha
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Aptian–Cenomanian echinoids from northern Sinai, Egypt
Cretaceous Research, 2021Abstract Aptian–lower Cenomanian sedimentary rocks, assigned to the Risan Aneiza and Halal formations and exposed in northern Sinai yield rich, well-preserved echinoid assemblages. Thirty-two species (16 regular and 16 irregular), in 27 genera, have been identified and are here systematically described from the Gebel El Tourkumanyia and Wadi El Karm ...
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Cenomanian and Turonian echinoids from Nigeria
Geobios, 1997Cenomanian to Middle Turonian echinoid faunas from Nigeria are described for the first time on the basis of new collections sampled during recent geological investigations in the Benue Trough. Five Cenomanian species have been recognized: Tetragramma variolare, Heterodiadema libycum, Micropedina olisiponensis, Mecaster pseudofourneli, Mecaster sp.
Didier Néraudeau, Philippe Courville
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The unusual cenomanian oyster Pycnodonte biauriculatum
Geobios, 1984Abstract From Albian to Maastrichtian times oysters belonging to the genus Pycnodonte were a major component of the bivalve fauna. In marly and sandy Cenomanian facies several oysters occurred in banks; one of them is Pycnodonte (P.) biauriculatum which is distributed from the Iberian Peninsula to Central Asia.
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