Author: L. Gordon MedarisPublisher: Geological Society of America
ISBN: 0813711606
Category : Science
Languages : en
Pages : 151
Book Description
Early Proterozoic Geology of the Great Lakes Region
Author: L. Gordon MedarisPublisher: Geological Society of America
ISBN: 0813711606
Category : Science
Languages : en
Pages : 151
Book Description
Great Lakes Rocks
Author: Stephen E. KeslerPublisher: University of Michigan Regional
ISBN: 0472053809
Category : Science
Languages : en
Pages : 369
Book Description
A much-needed exploration of Great Lakes geology
Geology of the Lake Superior Region
Author: Gene L. LaBergePublisher: Tucson, Ariz. : Geoscience Press
ISBN:
Category : Science
Languages : en
Pages : 324
Book Description
Considered one of the classic geologic areas of the world, the Lake Superior region is one of the most interesting geological areas in North America. An excellent resource for the reader, this book includes examples, photos, maps, and diagrams of the geology of this region.
Early Proterozoic Rocks of the Great Lakes Region
Author: G. B. MoreyPublisher:
ISBN: 9780875906256
Category : Geology
Languages : en
Pages : 0
Book Description
Sedimentology and Provenance of the Early Proterozoic Michigamme Formation and Goodrich Quartzite, Northern Michigan
Author: Richard W. OjakangasPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 40
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.
U.S. Geological Survey Bulletin
Author: U.S. Geological Survey Bulletin
Author: Gene L. LaBergePublisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 344
Book Description
A reconnaissance study carried out in conjunction with regional geologic mapping.
Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota
Author: David Leroy SouthwickPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 40
Book Description
Precambrian: Conterminous U.S.
Author: John C. Reed, Jr.Publisher: Geological Society of America
ISBN: 081375447X
Category : Science
Languages : en
Pages : 752
Book Description
This wide-ranging discussion of Precambrian rocks includes contributions from a diverse array of authors actively engaged in investigations of various aspects of U.S. Precambrian geology. Summary discussions by the editors of the five major chapters place these contributions in a logical regional framework.
Contributions to Mineral Resources Research, 1984
Author: Alfred Lerner BushPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 586
Book Description