The Taconide Zone and the Taconic Orogeny in the Western Part of the Northern Appalachian Orogen
Author: E-an Zen
Publisher: Geological Society of America
Published: 1972
Total Pages: 82
ISBN-13: 0813721350
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Author: E-an Zen
Publisher: Geological Society of America
Published: 1972
Total Pages: 82
ISBN-13: 0813721350
DOWNLOAD EBOOKAuthor: Brian Howard Baker
Publisher:
Published: 1972
Total Pages: 67
ISBN-13: 9780813721354
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Publisher:
Published: 1983
Total Pages: 372
ISBN-13:
DOWNLOAD EBOOKAuthor: Gary George Lash
Publisher:
Published: 1982
Total Pages: 506
ISBN-13:
DOWNLOAD EBOOKAuthor: David C. Roy
Publisher: Geological Society of America
Published: 1987
Total Pages: 496
ISBN-13: 0813754054
DOWNLOAD EBOOKAuthor: James Derby
Publisher: AAPG
Published: 2013-01-20
Total Pages: 1229
ISBN-13: 0891813802
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Author: Robert D. Hatcher, Jr.
Publisher: Geological Society of America
Published: 1989
Total Pages: 784
ISBN-13: 0813754526
DOWNLOAD EBOOKAuthor: Paul Kibler Sims
Publisher:
Published: 1983
Total Pages: 268
ISBN-13:
DOWNLOAD EBOOKThe 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: Robert D. Hatcher
Publisher: Geological Society of America
Published: 1983
Total Pages: 244
ISBN-13: 0813711584
DOWNLOAD EBOOKAuthor: U.S. Nuclear Regulatory Commission
Publisher:
Published: 1980
Total Pages: 172
ISBN-13:
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