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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.
| Autorius: | Vadim B. Lyatsky, Henry V. Lyatsky, |
| Serija: | Lecture Notes in Earth Sciences |
| Leidėjas: | Springer Berlin Heidelberg |
| Išleidimo metai: | 1999 |
| Knygos puslapių skaičius: | 412 |
| ISBN-10: | 3540661972 |
| ISBN-13: | 9783540661979 |
| Formatas: | 235 x 155 x 23 mm. Knyga minkštu viršeliu |
| Kalba: | Anglų |
Parašykite atsiliepimą apie „The Cordilleran Miogeosyncline in North America: Geologic Evolution and Tectonic Nature“
