Download or read book Proterozoic Geology of the Southern Rocky Mountains written by Jeffrey A. Grambling and published by Geological Society of America. This book was released on 1989-01-01 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proterozoic Geology written by L. Gordon Medaris and published by Geological Society of America. This book was released on 1983 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Proterozoic Geology of Western North America and Siberia written by P. K. Link and published by . This book was released on 2007 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a compendium of research on the Belt Supergroup. It is an outgrowth of Belt Symposium IV, held in Salmon, Idaho, in July, 2003, in conjunction with the Tobacco Root Geological Society annual field conference. Because of the geographic extent and great thickness of the Belt Supergroup, years of work have been required before conclusions are "bona fide". The Mesoproterozoic Belt Supergroup of western Montana and adjacent areas is geologically and economically important, but it has been frustratingly hard to understand. The previous Belt Symposium volumes offer an historical view of the progress of the science of geology in the western United States. The advent of U-Pb geochronology, especially using the ion microprobe (SHRIMP) and laser-ablation ICPMS, has injected geochronometric reality into long-standing arguments about Belt stratigraphy. Several papers in this volume utilize these new tools to provide constraints on age and correlation of Belt strata (Chamberlain et al., Lewis et al., Link et al., and Doherty et al.)
Download or read book Geology Geochronology Geochemistry and Pb isotopic Compositions of Proterozoic Rocks Poachie Region West central Arizona written by Bruce Bryant and published by . This book was released on 2001 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Proterozoic in Canada written by James E. Gill and published by University of Toronto Press. This book was released on 1957-12-15 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proterozoic time produced much of great interest to geologists, and was of tremendous economic import to the people of Canada and the United States. Most of the iron deposits of the Lake Superior district, the Michigan copper deposits, the enormously important Sudbury nickel-copper-platinum deposits, the spectacular silver deposits of the Cobalt district, and all of the important uranium ores in the Shield area are considered to have formed during this period in geological time. Proterozoic rock groups include those Precambrian rocks which are least deformed and metamorphosed. Because of their important economic deposits, they have been examined in great detail in certain localities. The results of such examination, and of others which were for reconnaissance only, are summarized in this volume of the Royal Society of Canada. Suggestions are made for revision of previous interpretations of Precambrian history, and the terminology which grew out of them. Three papers deal with problems arising from the current use of the term Proterozoic, and with possible changes in its use to bring it more into accord with the facts. Contributors to this volume are: E.M. Abraham, Robert Bergeron, R.G. Blackadar, I.C. Brown, G.H. Charleswood, J.F. Davies, K.E. Eade, W.F. Fahrig, R.M. Farquhar, James E. Gill, H.C. Gunning, J.M. Harrison, D.F. Hewitt, W.W. Moorhouse, J.E. Reesor, S.M. Roscoe, R.D. Russell, James E. Thomson, Robert Thomson, L.J. Weeks, Alice E. Wilson, J.T. Wilson, G.M. Wright.
Download or read book Proterozoic Crustal Evolution written by K.C. Condie and published by Elsevier. This book was released on 1993-02-03 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a final product of the International Geological Correlation Program (IGCP) Project 217, this volume brings together significant advances in the understanding of Proterozoic crustal evolution. This IGCP Project focussed on nine research objectives: 1) Comparison of Archean and Proterozoic supracrustal assemblages to more fully understand differences between Archean and post-Archean tectonic regimes; 2) To more fully understand the geochemical differences between Archean and post-Archean sediments and to evaluate the various factors that control sediment composition; 3) From combined U/Pb zircon and whole-rock Sm/Nd studies, to see if the apparent 2.4-2.0 continental crust "generation gap" is real; 4) To employ new techniques in the dating of individual zircons to more fully understand Proterozoic tectonic history and the role of crustal reworking; 5) From trace element ratios and Nd isotopic data from basalts, to better understand Proterozoic mantle evolution; 6) To encourage more detailed studies of the anorogenic granite-anorthosite association to better understand its origin and significance in terms of crustal evolution; 7) From combined Nd, Pb, and Sr isotopic data, to more precisely estimate the amount of new continental crust formed during the Proterozoic; 8) To encourage joint P-T and geochronological studies of Proterozoic and high-grade terranes to better understand Proterozoic orogenesis: and 9) To try and understand why hydrothermal precious metal deposits are relatively rare in the Proterozoic compared to both the Archean and the Phanerozoic. The book should be of interest to professionals in the geosciences (especially geochemists, petrologists and structural geologists) and graduate students in the same fields.
Download or read book Geology and Geochemistry of Early Proterozoic Rocks in the Dunbar Area Northeastern Wisconsin written by Paul Kibler Sims and published by . This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field relations, lithology, isotope ages, and tectonic implications of volcanic and granitoid rocks.
Download or read book Proterozoic Tectonic Evolution of the Grenville Orogen in North America written by Richard P. Tollo and published by Geological Society of America. This book was released on 2004-01-01 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Proterozoic Biosphere written by J. William Schopf and published by Cambridge University Press. This book was released on 1992-06-26 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1992, The Proterozoic Biosphere was the first major study of the paleobiology of the Proterozoic Earth.
Download or read book Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands written by Richard A. Volkert and published by . This book was released on 1999 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proterozoic Geology and Ore Deposits of Arizona written by and published by . This book was released on 1991 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proterozoic Geology of the Granite Village Area Albany and Laramie Counties Wyoming Compared with that of the Sierra Madre and Medicine Bow Mountains of Southeastern Wyoming written by Robert Stroud Houston and published by . This book was released on 1997 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Middle Proterozoic to Cambrian rifting central North America written by Richard W. Ojakangas and published by Geological Society of America. This book was released on 1997-01-01 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the Tenth International Basement Tectonics Conference held at the University of Minnesota-Duluth in August 1992, this volume contains 19 papers, 13 of which focus on the Middle Proterozoic Midcontinent Rift. An introductory essay discussing the Middle Proterozoic to Cambrian rifting in central North America is followed by contributions addressing topics including the Midcontinent Rift in Michigan and Minnesota, the Port Coldwell veins of northern Ontario, and petrography and sedimentation in the western Lake Superior region. The last five papers deal with the pre-Mount Simon basins of Ohio, the English Graben and the newly proposed East Continent Rift Complex, the Reelfoot Rift/Rough Creek Graben in the evolution of the Illinois Basin, and the A-type sheet granites in the Oklahoma Aulacogen of Cambrian age. Bandw illustrations. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Stratigraphy and Depositional Environments of Middle Proterozoic Rocks Northern Part of the Lemhi Range Lemhi County Idaho written by Russell G. Tysdal and published by . This book was released on 2000 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proterozoic Nuna to Pleistocene Megafloods written by Mark D. McFaddan and published by Geological Society of America. This book was released on 2024-05-23 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in the Nomenclature and Stratigraphy of Proterozoic Metamorphic Rocks Tusas Mountains North central New Mexico written by Reinhard A. Wobus and published by . This book was released on 1985 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: