Results 1 to 10 of about 16,066 (225)

Integrated biostratigraphy of the Maastrichtian-Danian sequence in the southern Tethys with insights into paleoenvironmental implications [PDF]

Scientific Reports
The Cretaceous-Paleogene (K/Pg) sequence offers a global perception of the paleoecological evolution in the southern Tethys realm. High-resolution calcareous nannofossil and dinoflagellate cyst analyses were conducted on subsurface Maastrichtian-Danian ...
Ramadan M. El-Kahawy, Aya Raafat
doaj   +2 more sources

Planktonic foraminiferal and paleoenvironments of the Upper Campanian-Maastrichtian succession in Wadi Qena, Egypt

Egyptian Journal of Petroleum, 2019
Quantitative analysis of the Upper Campanian-Maastrichtian foraminiferal assemblages in Hawashiya and Umm Omeiyied exposed sections at Wadi Qena, Eastern Deseret, Egypt is reconstructed to study the paleoenvironments and relative sea level changes.
Abdel Galil A Hewaidy, Sherif Farouk, Medhat M M Mandur   +2 more
exaly   +3 more sources

The benthic foraminiferal response to the mid-Maastrichtian event in the Maastrichtian-type area [PDF]

Netherlands Journal of Geosciences, 2021
<p>The mid-Maastrichtian event (MME), ~69 Ma, represents a global negative δ<sup>13</sup>C excursion which is linked to the extinction of inoceramid bivalves and latitudinal migration of planktonic foraminifera.
Iris Vancoppenolle, Johan Vellekoop, Monika Doubrawa, Pim Kaskes, Matthias Sinnesael, John Jagt, Philippe Claeys, Robert P. Speijer   +7 more
  +10 more sources

A unique dentary suggests a third genus of batrachosauroidid salamander existed during the latest Cretaceous in the western USA [PDF]

Acta Palaeontologica Polonica, 2022
An incomplete salamander dentary (AMNH FARB 22965) described herein from the upper Maastrichtian Lance Formation, Wyoming, USA, exhibits a puzzling suite of features.
JAMES D. GARDNER
doaj   +1 more source

A New Species of the Durophagous Mosasaurid Carinodens from the Late Maastrichtian Phosphates of Morocco and Implications for Maastrichtian Mosasaurid Diversity

Diversity
Late Cretaceous marine ecosystems saw a major adaptive radiation of mosasaurids, which evolved highly disparate jaw and tooth morphologies to feed on different prey.
Nicholas R. Longrich, Xabier Pereda-Suberbiola, Nour-Eddine Jalil, Nathalie Bardet   +3 more
doaj   +2 more sources

The base of the Maastrichtian [PDF]

Bulletin of the Geological Society of Denmark, 2000
At the Brussels Symposium on Cretaceous Stage Boundaries in 1995, the Maastrichtian Working Group decided to recommend the first occurrence of the ammonite Pachydiscus neubergicus in the Tercis quarry near Dax in the Landes, southwest France as the boundary stratotype for the base of the Maastrichtian stage.
Walter Kegel Christensen, Jake M. Hancock, William James Kennedy   +2 more
openaire   +2 more sources

Biostratigraphy of Shiranish Formation from Selected Wells, Central of Iraq

Iraqi Geological Journal, 2023
The Quantitative high-resolution planktonic foraminiferal analysis of the subsurface section in three selected wells in the Ajeel Oil Field (Aj-8, Aj-12, and Aj-15) in Tikrit Governorate, Central Iraq has revealed that Shiranish Formation ...
Anwar Mousa, luay Shakir
doaj   +1 more source

Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India

Acta Palaeobotanica, 2022
The genus Surangea Chitaley et Sheikh, based on permineralized specimens from the Deccan Intertrappean Beds of central India, was originally considered to represent a fern megasporangium.
Deepak Ramteke, Selena Y. Smith, Dashrath K. Kapgate, Edward L. Stanley, Steven R. Manchester   +4 more
doaj   +1 more source

TAXONOMIC CONSIDERATION AND STRATIGRAPHIC IMPLICATION OF THE ACCELERATED EVOLUTION OF THE MAASTRICHTIAN-EOCENE TRANSITION OF TWENTY BENTHIC FORAMINIFERAL SPECIES IN THE TETHYS [PDF]

Earth Sciences Pakistan, 2020
Within the Maastrichtian-Eocene transition in some localities in the Tethys, ten trends of accelerated evolution are recognized within twenty species belong to eight benthic foraminiferal genera: Siphogaudryina, Textularia, Pseudoclavulina, Pyramidulina,
Haidar Salim Anan
doaj   +1 more source

Stratigraphy of Maastrichtian Foraminiferida from the United Kingdom; the Maastrichtian of Norfolk [PDF]

Netherlands Journal of Geosciences - Geologie en Mijnbouw, 2003
AbstractOnshore Maastrichtian strata in the United Kingdom are limited to a few small, isolated blocks of chalk floating within glacial sediments on the Norfolk coast. Isolated outcrops of Campanian and Maastrichtian chalks used to be available around Norwich but the majority of these exposures are now badly degraded.
M. Hart, T. Swiecicki
openaire   +1 more source