Turritella Zonation Across the Cretaceous-Tertiary Boundary, California PDF Download
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Author: Louella Rankin Saul
Publisher: Univ of California Press
ISBN: 9780520096790
Category : Science
Languages : en
Pages : 180
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Book Description
Author: Mahlon Vincent Kirk
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 108
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Book Description
Author: Louella Rankin Saul
Publisher: Univ of California Press
ISBN: 9780520096790
Category : Science
Languages : en
Pages : 180
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Book Description
Author: Louella R. Saul
Publisher:
ISBN: 9780783784250
Category :
Languages : en
Pages : 117
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Book Description
Author: Robert Arthur Demetrion
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Author: J. David Archibald
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: James E. Fassett
Publisher: Geological Society of America
ISBN: 0813722098
Category : Science
Languages : en
Pages : 210
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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.
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: Joseph Herbert Hartman
Publisher: Geological Society of America
ISBN: 9780813723617
Category : Science
Languages : en
Pages : 530
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Book Description
Author: Glen A. Izett
Publisher: Geological Society of America
ISBN: 0813722497
Category : Science
Languages : en
Pages : 108
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