Results 101 to 110 of about 370 (122)

Refined geochronology and revised stratigraphic nomenclature of the Upper Cretaceous Wahweap Formation, Utah, U.S.A. and the age of early Campanian vertebrates from southern Laramidia

open access: closedPalaeogeography, Palaeoclimatology, Palaeoecology, 2022
The Western Interior of North America preserves one of the most complete successions of Upper Cretaceous marine and non-marine strata in the world; among these, the Cenomanian-Campanian units of the Kaiparowits Plateau in southern Utah are a critical archive of terrestrial environments and biotas.
Beveridge, Tegan L.   +6 more
exaly   +5 more sources

A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs

open access: closedNaturwissenschaften, 2014
A new taxon of chasmosaurine ceratopsid demonstrates unexpected disparity in parietosquamosal frill shape among ceratopsid dinosaurs early in their evolutionary radiation. The new taxon is described based on two apomorphic squamosals collected from approximately time equivalent (approximately 77 million years old) sections of the upper Judith River ...
Michael J, Ryan   +3 more
exaly   +5 more sources

THE UPPER CRETACEOUS WILLIAMS FORK FORMATION (LATE CRETACEOUS: CAMPANIAN–MAASTRICHTIAN), NORTHWESTERN COLORADO, AND ITS PALEOECOLOGICAL IMPLICATIONS FOR LARAMIDIA

open access: closedGeological Society of America Abstracts with Programs
ReBecca Hunt-Foster   +8 more
exaly   +4 more sources

Fossil frogs from the early Campanian of West Texas, USA, with comments on Late Cretaceous anuran diversity in southern Laramidia

open access: closedPalaeobiodiversity and Palaeoenvironments, 2021
A rare early Campanian (Aquilan) assemblage consisting of disarticulated anuran bones is described from the Aguja Formation of West Texas, USA. Many specimens within the assemblage pertain to taxonomically informative elements (maxillae, urostyles, and ilia).
Steven L. Wick
openaire   +2 more sources

A NEW MICROVERTEBRATE ASSEMBLAGE FROM THE WILLIAMS FORK FORMATION (CAMPANIAN - MAASTRICHTIAN) OF COLORADO AND EVIDENCE FOR DISCRETE CLIMATE/FAUNAL ZONES ACROSS LARAMIDIA DURING THE ‘EDMONTONIAN’

open access: closedGeological Society of America Abstracts with Programs
Joel Peter Bazzini Crothers   +8 more
exaly   +4 more sources

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