Results 131 to 140 of about 1,776,549 (292)

MAMMALIAN EVOLUTION ACROSS THE CRETACEOUS/TERTIARY BOUNDARY: THE CONTRIBUTIONS OF SURVIVAL, DISPERSAL, AND EXTINCTION

Publicación Electrónica de la Asociación Paleontológica Argentina, 2015
Currently the most detailed fossil record of mammalian evolution across the Cretaceous/Tertiary (K/T) boundary is derived from the Western Interior of North America.
William A. Clemens
doaj  

New pipimorphs from the Late Cretaceous of Niger

Annales de Paléontologie
In Becetèn, in southeast Niger, is one of the few mid-Upper Cretaceous (Coniacian-Santonian) fossiliferous localities in Africa where multiple anuran taxa are known. Two of them, Pachycentrata taqueti and Inbecetenanura ragei, have been described from In Becetèn.Both are pipids, a clade composed of exclusively aquatic anurans.
Lemierre, Alfred, Bailon, Salvador, Folie, Annelise, Laurin, Michel   +3 more
openaire   +2 more sources

COSMOS model Late Cretaceous surface temperature results with different CO2 levels and gateway configurations in NetCDF format

, 2017
COSMOS model Late Cretaceous surface temperature results with different CO2 levels and gateway configurations in NetCDF ...
Igor Niezgodzki (6972986), Jaroslaw Tyszka (7884635), Lohmann, Gerrit, Markwick, Paul J, Knorr, Gregor, Gregor Knorr (6971348), Niezgodzki, Igor, Tyszka, Jaroslaw, Paul J Markwick (8020337), Gerrit Lohmann (6972983)   +9 more
core   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Stratigraphy of El Chanate Group (Late Cretaceous) and its implications for the tectonic evolution of northwestern Sonora, Mexico

Revista Mexicana de Ciencias Geológicas, 2018
The Late Cretaceous El Chanate Group is a clastic and volcanic sequence, ranging from 700 to more tan 2,800 m in thickness, deposited in a continental basin. It disconformably overlies the Lower Cretaceous Bisbee Group and underlies the Late Cretaceous (
César Jacques-Áyala
doaj  

Characteristics of Gravity Flow Deposits in the Benin Basin (Benin) and Implications for Oil and Gas Exploration

Geological Journal, EarlyView.
This study reveals that the underexplored Benin Basin features a narrow shelf and steep slope, which promoted the development of multi‐phase, stacked channel‐lobe complexes. These gravity flow deposits, further enhanced by bottom current reworking, reveal a significant undiscovered Upper Cretaceous stratigraphic play with considerable petroleum ...
Liu Zuodong, Wen Zhixin, Song Chenpeng, Wang Xueling, Shen Yiping   +4 more
wiley   +1 more source

Atmospheric pCO2 compilation from pedogenic carbon for the Late Cretaceous-Early Paleogene

, 2019
Atmospheric pCO2 compilation from pedogenic carbon for the Late Cretaceous-Early ...
Kroon, Dick, James S K Barnet (6974810), James C Zachos (6958619), Westerhold, Thomas, Dick Kroon (6959372), Bailey, Ian, Ursula Röhl (6959540), Melanie J Leng (7881500), Röhl, Ursula, Littler, Kate, Zachos, James C, Leng, Melanie J, Kate Littler (6974813), Barnet, James S K, Thomas Westerhold (6960026), Ian Bailey (6959432)   +15 more
core   +1 more source

Tectono‐Sedimentary Evolution of the Neogene İnegöl Basin (NW Anatolia): Constraints on Transtensional Basin Development at the Junction of the Western Anatolian Extensional Province and the North Anatolian Fault Zone

Geological Journal, EarlyView.
The study outlines the tectono‐sedimentary evolution of the İnegöl Basin in north‐western Anatolia. Basin formation was controlled by interacting extensional and strike‐slip fault systems linked to uplift of the Uludağ Massif. Terrestrial sedimentation from the Miocene to Pleistocene is reconstructed using abundant fossil mammal assemblages that ...
M. Cihat Alçiçek, Volkan Karabacak, Serdar Mayda   +2 more
wiley   +1 more source

Local Structures of Se and Br in Cretaceous–Paleogene Boundary Sediments and Concentration Effects of Ferrihydrite Originating From Impact Ejecta

Geological Journal, EarlyView.
Chemical states of Se and Br atoms in the KPg boundary sediments from Stevns Klint were studied using XAFS spectroscopy. The high concentrations of Se4+ could become an index of the degree to which the global environment was soiled with dust and ash derived from impact ejecta or volcanic eruptions.
Kei‐ichiro Murai, Akira Yoshiasa, Ginga Kitahara, Makoto Tokuda, Satoko Ishimaru, Toshihiro Moriga   +5 more
wiley   +1 more source