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Author: Peter Born
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 81
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Book Description
Author: Peter Born
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 81
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 1324
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Book Description
Author: Peter Born
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 100
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Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 1048
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Author:
Publisher: Natural Resources Canada
ISBN: 0662324412
Category : Geology, Stratigraphic
Languages : en
Pages : 16
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1324
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 372
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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 : Geology
Languages : en
Pages : 1300
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1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 1330
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