Results 21 to 30 of about 211,638 (344)

Nikolay Ivanovitch Karakash - an outstanding scientist-naturalist

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2015
The 2016 year is a year of the 100th anniversary of the death of the outstanding Russian geologist and paleontologist, one of the first investigators of Cretaceous deposits of Crimea and Caucasus, Nikolay Ivanovitch Karakash.
V. N. Komarov
doaj   +1 more source

Petrography and diagenetic history of the Shurijeh Formation (Late Kimmeridgian–Hautrivian) at Estarkhi section, Kopet-Dagh Basin, NE Iran [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
The Shurijeh Formation is a Late Jurassic–Early Cretaceous (Late Kimmeridgian–Hauterivian) siliciclastic rock unit of the Kopet-Dagh Basin, up to 392 m thick.
Mehdi Reza Poursoltani
doaj   +1 more source

New ophthalmosaurid ichthyosaurs from the European lower cretaceous demonstrate extensive ichthyosaur survival across the Jurassic–Cretaceous boundary [PDF]

open access: yes, 2012
Background Ichthyosauria is a diverse clade of marine amniotes that spanned most of the Mesozoic. Until recently, most authors interpreted the fossil record as showing that three major extinction events affected this group during its history: one ...
Ralf Kosma (189585)   +65 more
core   +1 more source

The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary

open access: yesScience, 2019
Two timelines for extinction The Cretaceous-Paleogene extinction that wiped out the nonavian dinosaurs 66 million years ago was correlated with two extreme events: The Chicxulub impact occurred at roughly the same time that massive amounts of lava were ...
C. Sprain   +5 more
semanticscholar   +1 more source

Rifts, orogens, cratons, and global tectonics: Introduction

open access: yesГеодинамика и тектонофизика, 2017
A key role in developing the Earth theory is played by comparative studies of orogens, rifts, and platforms in the equatorial, middle and high latitudes of Asia and the adjacent Arctic regions.
S. V. Rasskazov
doaj   +1 more source

New Geochronological Age Constraint and Chemostratigraphy for Aptian Lacustrine Strata, Cedar Mountain Formation, Utah

open access: yesGeochemistry, Geophysics, Geosystems, 2023
The Early Cretaceous is an important time of transition in Earth history, marked by a succession of oceanic anoxic events and carbon cycle perturbations that drove changes on land and in the ocean.
Marina B. Suarez   +8 more
doaj   +1 more source

On the Cretaceous Dentaliidæ [PDF]

open access: yesQuarterly Journal of the Geological Society of London, 1878
I n this paper are described and grouped the shells of the family Dentaliidæ which have been obtained from the Cretaceous rocks of Great Britain. It includes all the forms I know of; but there may be in local museums and private collections specimens I have not seen. In the genus
openaire   +2 more sources

An anhanguerian pterodactyloid mandible from the lower Valanginian of Northern Germany, and the German record of Cretaceous pterosaurs [PDF]

open access: yesActa Palaeontologica Polonica, 2021
The record of Cretaceous pterosaur remains from Germany is sparse. The material recovered to date includes the fragmentary holotypes of Targaryendraco wiedenrothi and Ctenochasma roemeri, as well as a few isolated pterodactyloid teeth and some ...
Pascal Abel   +3 more
doaj   +1 more source

New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution [PDF]

open access: yesActa Palaeontologica Polonica, 2022
A new specimen of Lactodens sheni, the only known spalacolestine from the Early Cretaceous Jehol Biota, is reported from the Jiufotang Formation, Liaoning, China.
FANGYUAN MAO, CUNYU LIU, JIN MENG
doaj   +1 more source

Exceptional continental record of biotic recovery after the Cretaceous–Paleogene mass extinction

open access: yesScience, 2019
Terrestrial record of recovery The extinction that occurred at the end of the Cretaceous period is best known as the end of the nonavian dinosaurs.
T. Lyson   +18 more
semanticscholar   +1 more source

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