Results 61 to 70 of about 30,004 (307)

Calcareous nannofossils, biostratigraphy, and paleobiogeography of the Aptian/Albian Romualdo Formation in the Araripe Basin, North-Eastern Brazil

Brazilian Journal of Geology, 2023
The objectives of this study were the biostratigraphic and paleobiogeographic interpretations of the calcareous nannofossil records of the Romualdo Formation (Aptian-Albian) in the south-central portion of the Araripe Basin.
Flávia Azevedo Pedrosa Lemos, Yumi Asakura, Rogério Loureiro Antunes, Rilda Verônica Cardoso de Araripe, Ludmila Alves Cadeira do Prado, Maria Emilia Travassos Rio Tomé, David Holanda de Oliveira, Luiz Ricardo Silva Lobo do Nascimento, Christiano Ng, Alcina Magnólia Franca Barreto   +9 more
doaj   +1 more source

The Lower Cretaceous Deposits of Maryland [PDF]

Science, 1912
n ...
openaire   +1 more source

The cranial, mandibular, and hyoid anatomy of softshell turtles (Trionychidae): A revised character list for phylogenetic analysis

The Anatomical Record, EarlyView.
Abstract Softshell turtles (Pan‐Trionychidae) are an early branching clade of hidden‐necked turtles (Cryptodira) with a rich fossil record extending back to the Early Cretaceous. The evolutionary history of softshell turtles is still unresolved because of their conservative morphology combined with high levels of polymorphism related to morphological ...
Léa C. Girard, Walter G. Joyce
wiley   +1 more source

A new dromaeosaurid (Dinosauria: Theropoda) from the Upper Cretaceous Wulansuhai Formation of Inner Mongolia, China

, 2010
We describe a new dromaeosaurid theropod from the Upper Cretaceous Wulansuhai Formation of Bayan Mandahu, Inner Mongolia. The new taxon, Linheraptor exquisitus gen. et sp.
Tan, Q., Sullivan, C., Xu, X., Sullivan, Corwin, Norell, Mark A., Tan, Lin, Clark, JM, Xiao, D., Choiniere, Jonah N., Pittman, M.D., Tan, L, Pittman, Michael, Tan, Qingwei, Choiniere, J.N., Sullivan, C, Tan, Q, Hone, D.W.E., Hone, David W. E., Tan, L., Hone, DWE, Norell, MA, Li, Z., Li, Zhiquan, Xu, X, Xiao, D, Pittman, M, Clark, J.M., Choiniere, JN, Li, Z, Clark, James M., Xu, Xing, Xiao, Dong, Norrell, M.A.   +32 more
core   +1 more source

Petrological and Geochemical Constraints on the Origin of Early Cretaceous Volcanic Rocks in the Central‐East Asia: Implications for Crustal Growth and Evolution

Geochemistry, Geophysics, Geosystems, 2018
New petrological and geochemical data for Early Cretaceous volcanic rocks in the North China Craton (NCC) combined with published data of cotemporaneous volcanic rocks in the NCC and eastern Central Asian Orogenic Belt (ECAOB) are used to understand ...
Sheng‐Ping Qian, Zhong‐Yuan Ren, Le Zhang, Lei Zhang, Ya‐Dong Wu, Sheng‐Wang Mei, Xiao‐Bo Xu, Qing‐Chen Luo   +7 more
doaj   +1 more source

Growth dynamics, skeletochronology, and histovariability of the theropod dinosaur Berthasaura leopoldinae

The Anatomical Record, EarlyView.
Osteohistological sampling on different bones of theropod dinosaur documents discrepant age record, growth, and metabolism. This could result unprecise paleobiological inferences if samplings are based on single bones. However, multi‐bone sampling can attenuate these discrepancies, helping to infer growth dynamics and physiology of these extinct ...
Geovane Alves de Souza, Marina Bento Soares, Luiz Carlos Weinschütz, Alexander Wilhelm Armin Kellner   +3 more
wiley   +1 more source

Shark and ray teeth from the Hauterivian (Lower Cretaceous) of north-east England [PDF]

, 1999
Sampling of hiatal horizons within the Hauterivian part of the Speeton Clay Formation of north-east England has produced teeth of several species of sharks and rays, four of which are previously unnamed.
Veltkamp, K.J., Underwood, Charlie J., Mitchell, S.F.   +2 more
core  

Lower and Middle Cenomanian ammonites from the Morondava Basin, Madagascar [PDF]

, 2013
Lower and Middle Cenomanian ammonite assemblages have been collected on a bed-by-bed basis from localities at Vohipaly and Mahaboboka, Madagascar, as well as from outcrops around Berekata, all in the Morondava Basin, southwest Madagascar.
Walaszczyk, I., Kennedy, William James, Gale, Andy, Dembicz, K., Praszkier, Tomasz, Dembicz, Krzysztof, Gale, A. S., Kennedy, W. J., Walaszczyk, Ireneusz, Praszkier, T.   +9 more
core   +1 more source

Stratigraphy of the Lower Cretaceous Cintura Formation, Sierra El Chanate, northwestern Sonora, Mexico

Revista Mexicana de Ciencias Geológicas, 2019
The lower Cretaceous Cintura Formation is described and defined as a stratigraphic unit for northwestern Sonora, Mexico. The reference sections are in the Sierra El Chanate, located about 20 km northeast of Caborca… in order to continue, download the ...
César Jacques-Ayala
doaj  

Conditions of formation and forecast of natural reservoirs in clinoform complex of the Lower Cretaceous of the Barents-Kara shelf

Georesursy, 2019
Unique Leningradsky and Rusanovsky gascondensate fields in the Barrem-Cenomanian layer are discovered in the Kara Sea. Non-industrial accumulations of oil and gas have been discovered in the Lower Cretaceous sediments of the western part of the Barents ...
A.V. Mordasova, A.B. Stoupakova, A.A. Suslova, D.K. Ershova, S.A. Sidorenko   +4 more
doaj   +1 more source