Non-dinosaurian Lower Vertebrates Across the Cretaceous-Tertiary Boundary in Northeastern Montana PDF Download
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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: Laurie J. Bryant
Publisher: Univ of California Press
ISBN: 9780520097353
Category : Science
Languages : en
Pages : 128
Get Book Here
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: Daniel I. Axelrod
Publisher:
ISBN: 9780520097353
Category : Cretaceous-Tertiary boundary
Languages : en
Pages : 115
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Book Description
Author: Laurie Jean Bryant
Publisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 274
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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: J. David Archibald
Publisher: JHU Press
ISBN: 0801898056
Category : Nature
Languages : en
Pages : 121
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Book Description
This study identifies the fall of dinosaurs as the factor that allowed mammals to evolve into the dominant tetrapod form. It refutes the single-cause impact theory for dinosaur extinction and demonstrates that multiple factors--massive volcanic eruptions, loss of shallow seas, and extraterrestrial impact--likely led to their demise. While their avian relatives ultimately survived and thrived, terrestrial dinosaurs did not. Taking their place as the dominant land and sea tetrapods were mammals, whose radiation was explosive following nonavian dinosaur extinction. The author argues that because of dinosaurs, Mesozoic mammals changed relatively slowly for 145 million years compared to the prodigious Cenozoic radiation that followed. Finally out from under the shadow of the giant reptiles, Cenozoic mammals evolved into the forms we recognize today in a mere ten million years after dinosaur extinction.
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: Philip J. Currie
Publisher: Indiana University Press
ISBN: 9780253345950
Category : Nature
Languages : en
Pages : 712
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Book Description
"This comprehensive history of a remarkable window into the history of the earth will be required reading for everyone interested in the life of the past."--BOOK JACKET.
Author: P.J. Harries
Publisher: Springer Science & Business Media
ISBN: 1402090536
Category : Science
Languages : en
Pages : 480
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Book Description
This volume delves into a spectrum of theoretical as well as applied aspects of high-resolution stratigraphic approaches in paleontology. It explores how increasingly detailed knowledge of the fossil record can enhance our understanding of the evolution of life on Earth and also allows geoscientists to address a broad range of important evolutionary and environmental questions in this arena. A 'zipped' version of the program CONOP9 2007 along with read-me files, sample files, and other documentation are available via a web site (see below). An earlier version of CONOP9 was initially supplied with 'High-Resolution Approaches in Stratigraphic Paleontology' (PJ Harries, editor) and described in Chapter 13 of that volume. This is an updated version of the program, and the documentation supplied with this version supersedes the information supplied in that chapter. To view the CONOP9 Programs, click on the link CONOP9 Programs on the right side of this page under Related links.
Author: James E. Martin
Publisher: Geological Society of America
ISBN: 0813724279
Category : Science
Languages : en
Pages : 264
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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.
