Results 51 to 60 of about 1,435 (177)

CALCAREOUS NANNOPLANKTON OF APTIAN OF MOUNTINE CRIMEA

Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine, 2013
Вперше для Гірського Крима наведені дані про стратиграфічне поширення вапняного нанопланктону з аптських відкладів. Показана можливість виділення двох нанопланктонних зон: Chiastozygus litterarius (нижній апт) та Rhagodiscus angustus (средній-верхній апт). Межа апту та альбу встановлена за появою Prediscosphaera cretacea. 
openaire   +3 more sources

The genus Ptychoceras d'Orbigny in the Aptian Albian of Patagonia and Antarctica

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2008
Fil: Riccardi, Alberto Carlos. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Division Paleozoologia Invertebrados; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas.
Riccardi, Alberto Carlos, Medina, Francisco Alberto   +1 more
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Exhumed eo‐Alpine High‐Pressure Rocks Fed Campanian Turbidites in Eastern Sardinia

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study investigates the detrital record of the early orogenic evolution of the Sardinia‐Calabria system, preserved in Upper Cretaceous arenites exposed in eastern Sardinia. Sardinia and Corsica form a continental block that includes a segment of the Alpine orogen and of its former foreland basin.
Francesco Massari, Maria Giuditta Fellin, Cristina Stefani, Eva Enkelmann, Iginio Dieni, Stefano Sanchetti   +5 more
wiley   +1 more source

Integrated stratigraphy of the Upper Barremian–Aptian sediments from the south-eastern Crimea

Geologica Carpathica, 2018
Previous studies made in different parts of the world have shown that Barremian–Aptian times imply many difficulties in deciphering the biostratigraphy, microfossil evolution and correlation of bioevents.
Karpuk Maria S., Shcherbinina Ekaterina A., Brovina Ekaterina A., Aleksandrova Galina N., Guzhikov Andrey Yu., Shchepetova Elena V., Tesakova Ekaterina M.   +6 more
doaj   +1 more source

Extroparvum occidentale gen. et sp. nov. and the Cretaceous diversification of Lauraceae

American Journal of Botany, Volume 113, Issue 7, July 2026.
Abstract Premise The fossil record of Lauraceae extends back to the Early Cretaceous and comprises numerous flowers. However, phylogenetic relationships of many of these fossil flowers remain unresolved. To better understand the early evolutionary history of Lauraceae, we conducted phylogenetic analyses of living and extinct members of the family and ...
Keana K. Tang, Kelly K. S. Matsunaga, Brian A. Atkinson   +2 more
wiley   +1 more source

Lower Aptian (Lower Cretaceous) ammonites from the basal strata of the La Peña Formation of Nuevo León State, northeast Mexico: biochronostratigraphic implications

Revista Mexicana de Ciencias Geológicas, 2018
Detailed paleontological studies of the basal strata of the La Peña Formation from a stratigraphic section of the State of Nuevo León, northeastern Mexico, reveal a rich ammonite assemblage representative of the local biozone indicative of the uppermost
Ricardo Barragán, Florentin J-M. R. Maurrasse   +1 more
doaj  

APTIAN TO CAMPANIAN CALCAREOUS NANNOFOSSILS BIOSTRATIGRAPHY FROM THE BOTTACCIONE SECTION, GUBBIO, CENTRAL ITALY

Rivista Italiana di Paleontologia e Stratigrafia, 2002
Late Aptian-Campanian biostratigraphic investigations performed on calcareous nannofossils provided a refined stratigraphic resolution  of the Scisti a Fucoidi and Scaglia Formations in the Bottaccione section (Umbria-Marche Basin, Central italy ...
FABRIZIO TREMOLADA
doaj   +1 more source

Fossil record of Ephedra in the Lower Cretaceous (Aptian), Argentina

Journal of Plant Research, 2017
Fossil plants from the Lower Cretaceous (upper Aptian) of the La Cantera Formation, Argentina, are described. The fossils studied represent a leafy shooting system with several orders of articulated and striated axes and attached leaves with unequivocal ephedroid affinity.
Puebla, Gabriela Griselda, Iglesias, Ari, Gomez, Maria Angelica, Pramparo, Mercedes Beatriz   +3 more
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Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, Volume 61, Issue 7, Page 1976-2001, July 2026.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

A New Ammonite Biostratigraphic Framework for Distal Urgonian Successions of North Provence and a Correlation with Southern Vercors

Diversity
New ammonite discoveries from the south-facing flank of Mont Ventoux (southern France) provide robust and refined age constraints on the maximum northward progradation of Urgonian depositional environments in northern Provence during the late Barremian ...
Camille Frau, Anthony J.-B. Tendil, Cyprien Lanteaume   +2 more
doaj   +1 more source