Results 61 to 70 of about 211,638 (344)

The Permian to Cretaceous succession at Permpasset, Wollaston Forland: the northernmost Permian and Triassic in North–East Greenland

GEUS Bulletin, 2021
Permian to Triassic outcrops in East Greenland diminish significantly northwards. Understanding the northward extent, and nature, of the Permian and Triassic successions has implications for regional palaeogeographic reconstructions and exploration in ...
Steven D. Andrews, Henrik Nøhr-Hansen, Pierpaolo Guarnieri, Karen Dybkjær, Sofie Lindström, Peter Alsen   +5 more
doaj   +1 more source

Late Maastrichtian pterosaurs from North Africa and mass extinction of Pterosauria at the Cretaceous-Paleogene boundary

PLoS Biology, 2018
Pterosaurs were the first vertebrates to evolve powered flight and the largest animals to ever take wing. The pterosaurs persisted for over 150 million years before disappearing at the end of the Cretaceous, but the patterns of and processes driving ...
N. Longrich, D. Martill, B. Andres
semanticscholar   +1 more source

A new pterosaur (Pterodactyloidea: Azhdarchidae) from the Upper Cretaceous of Morocco

, 2010
The Kem Kem beds in South Eastern Morocco contain a rich early Upper (or possibly late Lower) Cretaceous vertebrate assemblage. Fragmentary remains, predominantly teeth and jaw tips, represent several kinds of pterosaur although only one species, the ...
David M Unwin, Baidder, Lahssen, David M Martill, Ibrahim, Nizar, Lahssen Baidder, D. M. Martill (4169125), Ibrahim Nizar, Unwin David M., S. Zouhri (7618280), Baidder Lahssen, Zouhri Samir, N. Ibrahim (7618271), L. Baidder (7618277), Martill, David M., Nizar Ibrahim, Samir Zouhri, Zhouri, Samir, Unwin, David M., Martill David M., David M. Unwin (7618274)   +19 more
core   +1 more source

The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica

The Anatomical Record, EarlyView.
Abstract The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and Mirischia asymmetrica, the phylogenetic affinities of which are controversial.
Rafael Delcourt, Orlando Nelson Grillo, Christophe Hendrickx, Maximilian Kellermann, Max Cardoso Langer   +4 more
wiley   +1 more source

Biostratigraphy and conditions of formation of Albian and Cenomanian deposits on the south-western slope of the Ukrainian Shield (Middle Dnister region)

Geo&Bio, 2021
Data from a comprehensive study into the lithological composition and lateral distribution of Albian and Cenomanian deposits in the Middle Dnister region (Ukraine), in the watersheds of the Smotrych–Tarnava–Studenytsia–Ushytsia–Kalyus–Zhvan–Lyadova ...
L. Kyselevych, O. Kovalchuk
doaj   +1 more source

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

The Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Volcanic ash as a driver of enhanced organic carbon burial in the Cretaceous

Scientific Reports, 2018
On greater than million year timescales, carbon in the ocean-atmosphere-biosphere system is controlled by geologic inputs of CO2 through volcanic and metamorphic degassing.
Cin-Ty A. Lee, Hehe Jiang, E. Ronay, D. Minisini, Jackson Stiles, Matthew Neal   +5 more
semanticscholar   +1 more source

Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns

, 2016
publisher: Elsevier articletitle: Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns journaltitle: Perspectives in Plant Ecology, Evolution and Systematics articlelink: http://dx.doi.org/10.1016/j.ppees.2016.01.003 ...
Heinrichs, Jochen, Schmidt, AR, Heinrichs, J, Schneider, Harald, Schmidt, Alexander R.   +4 more
core   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Permafrost in the Cretaceous supergreenhouse

Nature Communications, 2022
AbstractEarth’s climate during the last 4.6 billion years has changed repeatedly between cold (icehouse) and warm (greenhouse) conditions. The hottest conditions (supergreenhouse) are widely assumed to have lacked an active cryosphere. Here we show that during the archetypal supergreenhouse Cretaceous Earth, an active cryosphere with permafrost existed
Dr Juan Pedro Rodríguez López, Chihua Wu, Tatiana A. Vishnivetskaya, Julian B. Murton, Wenqiang Tang, Chao Ma   +5 more
openaire   +4 more sources