Upper Missippian and Pennsylvanian Stratigraphy in Teton, Lincoln, and Sublette Counties, Wyoming PDF Download
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Author: Ruth Bachrach
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 82
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Book Description
Author: Ruth Bachrach
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 82
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 516
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Author: Arthur L. Bergren
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ISBN:
Category : Geology
Languages : en
Pages : 38
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Author: William Jasper Sando
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ISBN:
Category : Geology
Languages : en
Pages : 102
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Book Description
An analysis of the history of a late Paleozoic sea based on a comprehensive biostratigraphic study.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 280
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Book Description
Author: Ruth F. Bastanchury
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ISBN:
Category : Geology
Languages : en
Pages : 49
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Author: Edith Jean Richards
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ISBN:
Category : Geology
Languages : en
Pages : 48
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Author: Lawrence Carey Craig
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ISBN:
Category : Geology
Languages : en
Pages : 422
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Author: Dean L. Cummins
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Category : Geology
Languages : en
Pages : 57
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Author: Donald Robert Gorman
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Category : Amsden Formation
Languages : en
Pages : 358
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Book Description
The Amsden Formation was named by Darton ... for a sequence of rocks which outcrop along the higher outer slopes of the Big Horn mountains and occur stratigraphically above the Mississippian Madison Formation and below the massive Tensleep Formation ... Much work has been done on the Amsden Formation but a considerable amount of disagreement has resulted, especially concerning its age. The base of the formation has been placed at the Mississippian-Pennsylvanian Systemic boundary by some, and within the Mississippian Period by others. Contributing to the dilemma is a lack of diagnostic fossils in the basal beds, and failure to recognize the base in the Wind River mountains. The latter has resulted in the erroneous inclusion of underlying Mississippian units at the base. Geologists have been unable to correlate subunits within the Amsden Formation precisely from one section to the next because of (1) the scarcity of fossils, (2) the similarity of many of the units within any section, (3) the lateral lithologic variability that exists between sections, (4) the transitional nature of the contact with the Tensleep Formation, and (5) the irregular surface on which the basal beds were deposited. This investigation was undertaken to obtain additional information bearing on the age of the Amsden Formation, and to develop a method of correlating subunits from one location to another in order to interpret the history of sedimentation. Reliance for the correlation was placed on thickness of the units, their positions in sequence, general rock types, hand specimen characteristics, petrographic character of lithologies, fossils, and clay mineralogy.
