Correlation of Precambrian Rocks of the Lake Superior Region, United States PDF Download
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Author: G. B. Morey
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 42
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Book Description
Lithology, distribution, correlation, and isotope ages of exposed Precambrian rocks in the Lake Superior region of the north-central United States.
Author: G. B. Morey
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 42
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Book Description
Lithology, distribution, correlation, and isotope ages of exposed Precambrian rocks in the Lake Superior region of the north-central United States.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 452
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 174
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Book Description
Author:
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages :
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Author: Paul Kibler Sime
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 11
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Author: John Calvin Reed (Jr.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 680
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Book Description
Author: J. S. Klasner
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 32
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Book Description
Evidence for Early Proterozoic north-verging folding and thrusting in the continental foreland of the Penokean orogen is present in two widely separated areas in northern Michigan. In the eastern part of the exposed orogen, asymmetric to over-turned folds in the Early Proterozoic Michigamme Formation suggest an initial (D1) phase of possibly north verging thin-skinned deformation. A second phase (D2 ) is characterized by a more thick skinned deformation consisting of northward thrusting of Archean gneiss and overlying Early Proterozoic quartzite along ductile thrust faults. Crosscutting shear zones indicate a third phase (D3 ) of deformation involving east- northeast thrusting of Archean gneiss. Thick-skinned deformation D2 and D3 phases include spaced fracture cleavage, kink folds, and lineations in D1, foliation surfaces. Near the west end of the exposed orogen in Michigan, bedding-cleavage relationships in the Early Proterozoic Tyler Formation also indicate northward tectonic transport. These structures, which are interpreted as D1 lie along the north edge of the Archean Puritan batholith and associated Archean greenstone. The north-verging structures in the northern Michigan segment of the Penokean orogen were formed approximately 1,850 Ma during collision of the Wisconsin magmatic terranes with the continental foreland of Michigan, Wisconsin, and Minnesota.
Author: David Leroy Southwick
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 40
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Book Description
Author: Mike Walker
Publisher: John Wiley & Sons
ISBN: 1118700090
Category : Science
Languages : en
Pages : 311
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Book Description
This introductory textbook introduces the basics of dating, the range of techniques available and the strengths and limitations of each of the principal methods. Coverage includes: the concept of time in Quaternary Science and related fields the history of dating from lithostratigraphy and biostratigraphy the development and application of radiometric methods different methods in dating: radiometric dating, incremental dating, relative dating and age equivalence Presented in a clear and straightforward manner with the minimum of technical detail, this text is a great introduction for both students and practitioners in the Earth, Environmental and Archaeological Sciences. Praise from the reviews: "This book is a must for any Quaternary scientist." SOUTH AFRICAN GEOGRAPHICAL JOURNAL, September 2006 “...very well organized, clearly and straightforwardly written and provides a good overview on the wide field of Quaternary dating methods...” JOURNAL OF QUATERNARY SCIENCE, January 2007
Author: Ogden Tweto
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 32
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Book Description
Appraisal of existing nomenclature and measures needed for improvement.
