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Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield

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Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield

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Author : G. B. Morey
language : en
Publisher: Geological Society of America
Release Date : 1980

Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield written by G. B. Morey and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Science categories.

Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield Edited By G B Morey And G N Hanson

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Author :
language : en
Publisher:
Release Date : 1980

Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield Edited By G B Morey And G N Hanson written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Precambrian - Lake Superior region categories.

Special Papers

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Author :
language : en
Publisher:
Release Date : 1934

Special Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1934 with Geology categories.

U S Geological Survey Professional Paper

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Author :
language : en
Publisher:
Release Date : 1984

U S Geological Survey Professional Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.

Early Proterozoic Geology Of The Great Lakes Region

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Author : L. Gordon Medaris
language : en
Publisher: Geological Society of America
Release Date : 1983-01-01

Early Proterozoic Geology Of The Great Lakes Region written by L. Gordon Medaris and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983-01-01 with Science categories.

U S Geological Survey Bulletin

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Author : Paul Kibler Sims
language : en
Publisher:
Release Date : 1983

U S Geological Survey Bulletin written by Paul Kibler Sims and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Faults (Geology) categories.

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.