Results 251 to 260 of about 28,559 (299)
Some of the next articles are maybe not open access.
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 ...
T. N. Gorbachik +3 more
openaire +2 more sources
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 ...
T. N. Gorbachik +3 more
openaire +2 more sources
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 ...
openaire +2 more sources
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 ...
openaire +2 more sources
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
openaire +3 more sources
A Milankovitch scale for Cenomanian time
Terra Nova, 1989ABSTRACTA detailed cyclostratigraphy is present in the rhythmically bedded Cenomanian hemipelagic chalks of the northern Anglo‐Paris Basin, which can be correlated over 100,000 km2. Individual decimetre‐scale couplets probably represent the precession cycle (modes at 18 or 23 kyr), and can be readily grouped in sets averaging five, indicative of the ...
openaire +2 more sources
The Cenomanian deposits of south-east Devonshire
Proceedings of the Geologists' Association, 1961Abstract: A description is given of lateral variations displayed by the Cenomanian Limestone in the cliffs, landslips and beach-blocks between Haven Cliff and Pinhay Bay. By comparison with the better-exposed sections around Beer it is suggested that, as in the Beer district, the lateral variations in thickness and lithology reflect periclinal ...
openaire +3 more sources
The Cenomanian and Turonian in NortheasternCentral Asia
Cretaceous Research, 1984Abstract Northeastern Central Asia during the Albian and Early Cenomanianwas one of the peripheral basins of the Central Asian region. The similarity of their freshwater molluscs makes it possible to correlate isolated series in these two regions.
openaire +2 more sources
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
openaire +4 more sources
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.
openaire +2 more sources
2017
Le développement de la stratigraphie au xixesiècle connaît une innovation décisive en 1842 lorsqu’Alcide d’Orbigny intro-duit la notion d’étage géologique. Les étages sont définis dans unecertaine zone géographique qui montre une coupe type, ou stra-totype, permettant l’identification de l’unité géologique.
Morel, Nicolas +2 more
openaire +1 more source
Le développement de la stratigraphie au xixesiècle connaît une innovation décisive en 1842 lorsqu’Alcide d’Orbigny intro-duit la notion d’étage géologique. Les étages sont définis dans unecertaine zone géographique qui montre une coupe type, ou stra-totype, permettant l’identification de l’unité géologique.
Morel, Nicolas +2 more
openaire +1 more source
Nodosaurid Ankylosaur from the Cenomanian of Japan
Journal of Vertebrate Paleontology, 2005(2005). Nodosaurid Ankylosaur from the Cenomanian of Japan. Journal of Vertebrate Paleontology: Vol. 25, No. 1, pp. 240-245.
Kenneth Carpenter +2 more
openaire +2 more sources