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Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield
Download Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield full books in PDF, epub, and Kindle. Read online Selected Studies Of Archean Gneisses And Lower Proterozoic Rocks Southern Canadian Shield ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Selected Studies of Archean Gneisses and Lower Proterozoic Rocks, Southern Canadian Shield by : G. B. Morey
Download or read book Selected Studies of Archean Gneisses and Lower Proterozoic Rocks, Southern Canadian Shield written by G. B. Morey and published by Geological Society of America. This book was released on 1980 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Early Proterozoic Geology of the Great Lakes Region by : L. Gordon Medaris
Download or read book Early Proterozoic Geology of the Great Lakes Region written by L. Gordon Medaris and published by Geological Society of America. This book was released on 1983-01-01 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Memoir written by and published by . This book was released on 1934 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Papers written by and published by . This book was released on 1934 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geological Survey Professional Papers by : Geological Survey (U.S.)
Download or read book Geological Survey Professional Papers written by Geological Survey (U.S.) and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Geological Survey Professional Paper by :
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Earth in Context by : David M. Harland
Download or read book The Earth in Context written by David M. Harland and published by Springer Science & Business Media. This book was released on 2001-10-18 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distinguished space historian Harland tells an inspiring tale of scientific discovery with two interwoven strands tracing the earths geological history and the Earth in relation to the solar system. 100 illustrations.
Book Synopsis Archean to Anthropocene by : James D. Miller
Download or read book Archean to Anthropocene written by James D. Miller and published by Geological Society of America. This book was released on 2011-01-01 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shorter Contributions to Isotope Research by : Zell E. Peterman
Download or read book Shorter Contributions to Isotope Research written by Zell E. Peterman and published by . This book was released on 1986 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Great Lakes Tectonic Zone--revisited by : Paul Kibler Sime
Download or read book Great Lakes Tectonic Zone--revisited written by Paul Kibler Sime and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Great Lakes tectonic zone (GLTZ) is a Late Archean crustal boundary (paleosuture) at least 1,200 kilometers long that juxtaposes a Late Archean greenstone-granite terrane (Wawa subprovince of Superior province) on the north and an Early to Late Archean gneiss terrane (Minnesota River Valley subprovince) on the south. Recent mapping of an exposed seg- ment in the Marquette, Michigan, area provides new data on the vergence of the structure. These data necessitate reexami- nation of the COCORP seismic-reflection profiling in central Minnesota, which has been the principal basis for past views on the vergence of the GLTZ. In the Marquette area, the GLTZ is a northwest-striking mylonite zone about 2.3 kilometers wide that is superposed on previously deformed rocks of both Archean terranes. Shear zone walls strike N. 55°-60° W., and foliation in mylonite within the GLTZ strikes (average) N. 70° W. and dips 75° SW. A stretching lineation plunges 42° in a S. 43° E. direction. Hinges of tight to open (sheath?) folds of both Z- and S-symmetries plunge parallel to the lineation. The attitude of the lineation (line of tectonic transport and X finite strain axis), together with asymmetric kinematic indicators, indicates that collision at this locality was oblique; the collision resulted in dextral- thrust shear along the boundary, northwestward vergence, and overriding of the greenstone-granite terrane by the gneiss terrane. In contrast, the seismic-reflection profiling in central Minnesota has been interpreted by several investigators to indicate that the GLTZ is a shallowly north dipping (=30°) structure, which implies southward vergence on a north-dipping subduction zone. We suggest, alternatively, that the shallow- dipping reflectors in the seismic profiles indicate lithologic contacts related to recumbent and gently inclined folds (D1), perhaps enhanced by ductile deformation zones, and that the Morris fault is indeed the GLTZ. The Morris fault strikes about N. 70° E., dips steeply southeastward, is transparent in seismic profiles, appears to be narrow, and coincides with the inferred position of the GLTZ as shown on earlier maps. The oblique collision along northwest-trending segments of the GLTZ would be expected to produce dextral transpression across a large region north of the GLTZ, and may have produced an early nappe-forming event (D1) as well as younger upright folds (D2), and as a later, more brittle event, the numerous dextral faults and conjugate sinistral faults that are widespread in the Wawa and adjacent subprovinces.
Book Synopsis U.S. Geological Survey Bulletin by :
Download or read book U.S. Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Geological Survey Bulletin by : Paul Kibler Sims
Download or read book U.S. Geological Survey Bulletin written by Paul Kibler Sims and published by . This book was released on 1983 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Precambrian: Conterminous U.S. by : John C. Reed, Jr.
Download or read book Precambrian: Conterminous U.S. written by John C. Reed, Jr. and published by Geological Society of America. This book was released on 1993 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis U.S. Geological Survey Bulletin by : Gene L. LaBerge
Download or read book U.S. Geological Survey Bulletin written by Gene L. LaBerge and published by . This book was released on 1991 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reconnaissance study carried out in conjunction with regional geologic mapping.
Book Synopsis Geology, Hydrology and Mineral Resources of Crystalline Rock Areas of the Lake Superior Region, United States by :
Download or read book Geology, Hydrology and Mineral Resources of Crystalline Rock Areas of the Lake Superior Region, United States written by and published by . This book was released on 1983 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology of the Precambrian Superior and Grenville Provinces and Precambian Fossils in North America by : S.B. Lucas
Download or read book Geology of the Precambrian Superior and Grenville Provinces and Precambian Fossils in North America written by S.B. Lucas and published by Geological Society of America. This book was released on 1998 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a description of the geology and mineral deposits of the Superior Province of the Canadian Shield, an overview of Grenville Province geology, and a synopsis of Precambrian fossil occurrences in North America. Six large plates include a geological map of Canada, geological map of the Grenville Province, lithotectonic map of the Superior Province, Archean mineral deposit map of the Superior Province, and more.
Book Synopsis Precambrian Geology by : Alan M. Goodwin
Download or read book Precambrian Geology written by Alan M. Goodwin and published by Elsevier. This book was released on 2016-02-06 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this book is to provide a modern comprehensive statement on the Earth's Precambrian crust. It uses geographic and tectonic location, lithostratigraphy, geochronology, and petrogenesis as a basis for considering Precambrian coastal evolution--including the role of plate tectonics. Detailed consideration is given to the endogenic and exogenic processes which formed the continental crust and also to its subsequent secular evolution across Precambrian time**An essential reference volume for every Precambrian geologist.
