35th Annual Institute on Lake Superior Geology PDF Download
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Author: John C. Green
Publisher: Houghton, Mich. : The Institute
ISBN:
Category : Geology
Languages : en
Pages : 138
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Book Description
Author: John C. Green
Publisher: Houghton, Mich. : The Institute
ISBN:
Category : Geology
Languages : en
Pages : 138
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Book Description
Author: Institute on Lake Superior Geology. Meeting
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 114
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Book Description
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 836
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 114
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 386
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 616
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Book Description
Author: Paul Kibler Sims
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 268
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Book Description
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:
Publisher:
ISBN:
Category : Ice
Languages : en
Pages : 594
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Author: Minnesota Geological Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 160
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 372
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Book Description
