The Cordilleran Miogeosyncline in North America: Geologic Evolution and Tectonic Nature

di Henry V. Lyatsky (Autore)

Vadim B. Lyatsky (Autore)

Springer-Verlag Berlin and Heidelberg GmbH & Co. KG, 1999

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.

• Autore: Henry V. Lyatsky, Vadim B. Lyatsky
• Editore: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
• Collana: Lecture Notes in Earth Sciences
• Anno: 1999
• Rilegatura: Paperback / softback
• Pagine: 388 p.
• Dimensioni: 235 x 155 mm
• EAN: 9783540661979

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