Changes in Stratigraphic Nomenclature by the U.S. (United States) Geological Survey, 1974 PDF Download
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Author: Geological Survey (U.S.)
Publisher:
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Category :
Languages : en
Pages : 0
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Author: George V. Cohee
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Category :
Languages : en
Pages :
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Author: Geological Survey (U.S.)
Publisher:
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Category :
Languages : en
Pages : 0
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Author: George Vincent Cohee
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Category : Geology, Stratigraphic
Languages : en
Pages : 44
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Author: Geological Survey (U.S.)
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Category : Authorship
Languages : en
Pages : 282
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Author: Charles G. Cunningham
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Category : Geology
Languages : en
Pages : 40
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Author: Lucy E. Edwards
Publisher:
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Category : Geology
Languages : en
Pages : 264
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Author: Michael Elliot Smith
Publisher: Springer
ISBN: 9401799067
Category : Science
Languages : en
Pages : 359
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This volume presents a suite of detailed stratigraphic and sedimentologic investigations of the Eocene Green River Formation of Wyoming, Colorado and Utah, one of the world’s foremost terrestrial archives of lacustrine and alluvial deposition during the warmest portion of the early Cenozoic. Its twelve chapters encompass the rich and varied record of lacustrine stratigraphy, sedimentology, geochronology, geochemistry and paleontology. Chapters 2-9 provide detailed member-scale synthesis of Green River Formation strata within the Greater Green River, Fossil, Piceance Creek and Uinta Basins, while its final two chapters address its enigmatic evaporite deposits and ichnofossils at broad, interbasinal scale.
Author: Richard W. Ojakangas
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 40
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The Early Proterozoic Michigamme Formation of northern Michigan was deposited in the southeastern part of the Animikie basin. The formation conformably overlies the Goodrich Quartzite and comprises three widespread members a lower member of thin-bedded shale, siltstone, and sandstone; the Bijiki Iron-formation Member; and an upper member of tur- biditic graywacke, siltstone, and mudstone and a few local members. The Goodrich Quartzite is interpreted as having been deposited in a tidally influenced shallow marine environ- ment. The lower member of the Michigamme is interpreted as having been deposited in a tidally influenced environment, the iron-formation member as having been deposited below wave base in somewhat deeper water, and the upper member as having been deposited in still deeper water with turbidity currents being a major depositional mechanism. Several lines of evidence including paleocurrents, paleo- geographic setting, and neodymium isotopes suggest that the graywacke of the southern part of the outcrop area was derived from the south (Early Proterozoic Wisconsin magmatic terranes, Archean miniplates, and older Early Proterozoic sedimentary units formed on the continental margin), and that the graywacke in the northern area was derived from an Archean terrane to the north. The tectonic model that best fits the available data is a northward-migrating foreland basin.
Author: Charles Butts
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 442
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Author: William J. Perry
Publisher:
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Category : Geology
Languages : en
Pages : 28
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