The Cordilleran Miogeosyncline in North America

The Cordilleran Miogeosyncline in North America
Author :
Publisher : Springer
Total Pages : 494
Release :
ISBN-10 : 9783540486930
ISBN-13 : 3540486933
Rating : 4/5 (933 Downloads)

Book Synopsis The Cordilleran Miogeosyncline in North America by : Henry V. Lyatsky

Download or read book The Cordilleran Miogeosyncline in North America written by Henry V. Lyatsky and published by Springer. This book was released on 2006-04-10 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steep crustal-scale faults, having their origins in the Late Archean and Early Proterozoic and trending NE-SW, which define the fundamental block lithospheric structure of the North American craton, are seen from geological and geophysical evidence to continue far into the interior of the Late Proterozoic-Phanerozoic Canadian Cordilleran mobile megabelt. This suggests that variously reworked ex-cratonic basement blocks underlie much of the Cordillera. The western edge of the modern craton is probably near the Rocky Mountain-Omineca belt boundary; the Rocky Mountain fold-and-thrust belt on the east side of the Cordillera is evidently rootless and overlies the undisturbed cratonic basement. Phanerozoic differences between the Cordilleran tectonic belts, resulting from a long, dissimilar, multi-cycle history of waxing and waning orogenesis apparent from the rock record, lie chiefly in the degree of indigenous tectonic remobilization and reworking of the ancient crust.

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