A Study of Mammalia and Geology Across the Cretaceous-tertiary Boundary in Garfield County, Montana PDF Download
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Author: J. David Archibald
Publisher: Univ of California Press
ISBN: 9780520096394
Category : Science
Languages : en
Pages : 180
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Book Description
Author: J. David Archibald
Publisher: Univ of California Press
ISBN: 9780520096394
Category : Science
Languages : en
Pages : 180
Get Book Here
Book Description
Author: J. David Archibald
Publisher: Univ of California Press
ISBN: 9780520096394
Category : Science
Languages : en
Pages : 306
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Book Description
Author: Laurie J. Bryant
Publisher: Univ of California Press
ISBN: 9780520097353
Category : Science
Languages : en
Pages : 128
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Book Description
00 This study presents current data on vertebrate survival and extinction across the Cretaceous-Tertiary boundary in Montana. Nearly all the common taxa of reptiles (except dinosaurs), amphibians, and fish survived the end of the Cretaceous Period; extinctions were concentrated among rare groups and those found in near-shore habitats. The author concludes that ocean regression and climatic deterioration may explain these selective extinction patterns better than catastrophic hypotheses. This study presents current data on vertebrate survival and extinction across the Cretaceous-Tertiary boundary in Montana. Nearly all the common taxa of reptiles (except dinosaurs), amphibians, and fish survived the end of the Cretaceous Period; extinctions were concentrated among rare groups and those found in near-shore habitats. The author concludes that ocean regression and climatic deterioration may explain these selective extinction patterns better than catastrophic hypotheses.
Author: Gregory P. Wilson
Publisher: Geological Society of America
ISBN: 0813725038
Category : Science
Languages : en
Pages : 396
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Book Description
"The chapters represent a surge of field and laboratory research activity, illustrating the impacts of new and refined methods and tools. This volume explores geologic and biologic history preserved in the strata bounding the Cretaceous-Paleogene boundary"--Provided by publisher.
Author: James E. Fassett
Publisher: Geological Society of America
ISBN: 0813722098
Category : Science
Languages : en
Pages : 210
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Book Description
Author: Thomas M. Bown
Publisher: Geological Society of America
ISBN: 0813722438
Category : Science
Languages : en
Pages : 253
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Book Description
Author: Joseph Herbert Hartman
Publisher: Geological Society of America
ISBN: 9780813723617
Category : Science
Languages : en
Pages : 530
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Book Description
Author: Michael O. Woodburne
Publisher: Columbia University Press
ISBN: 0231130406
Category : Computers
Languages : en
Pages : 413
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Book Description
This book places into modern context the information by which North American mammalian paleontologists recognize, divide, calibrate, and discuss intervals of mammalian evolution known as North American Land Mammal Ages. It incorporates new information on the systematic biology of the fossil record and utilizes the many recent advances in geochronologic methods and their results. The book describes the increasingly highly resolved stratigraphy into which all available temporally significant data and applications are integrated. Extensive temporal coverage includes the Lancian part of the Late Cretaceous, and geographical coverage includes information from Mexico, an integral part of the North American fauna, past and present.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 702
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Book Description
Author: Donald L. Lofgren
Publisher: Univ of California Press
ISBN: 9780520915794
Category : Science
Languages : en
Pages : 204
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Book Description
Bug Creek assemblages from Montana, transitional in composition between typical Cretaceous and Paleocene vertebrate faunas, are critical to K-T extinction debates because they have been used to support both gradual and catastrophic K-T extinction scenarios. Geological and palynological data from McGuire Creek indicate that Bug Creek assemblages are Paleocene and restricted to channel fills entrenched into older sediments, suggesting that the Cretaceous component of the assemblage was reworked. Thus, the author concludes, "Paleocene dinosaurs" are an illusion and the K-T survival rate of mammals is low because the presence of Cretaceous mammals in Bug Creek assemblages is also the result of reworking.
