Geologic Studies Of The Cordilleran Thrust Belt
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Geologic Studies Of The Cordilleran Thrust Belt
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Author : Richard Blake Powers
language : en
Publisher:
Release Date : 1982
Geologic Studies Of The Cordilleran Thrust Belt written by Richard Blake Powers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Geochemistry categories.
Geologic Studies Of The Cordilleran Thrust Belt
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Author : Richard Blake Powers
language : en
Publisher:
Release Date : 1982
Geologic Studies Of The Cordilleran Thrust Belt written by Richard Blake Powers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
Geologic Studies Of The Cordilleran Thrust Belt
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Author : Richard Blake Powers
language : en
Publisher:
Release Date : 1982
Geologic Studies Of The Cordilleran Thrust Belt written by Richard Blake Powers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
Interaction Of The Rocky Mountain Foreland And The Cordilleran Thrust Belt
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Author : Christopher J. Schmidt
language : en
Publisher: Geological Society of America
Release Date : 1988
Interaction Of The Rocky Mountain Foreland And The Cordilleran Thrust Belt written by Christopher J. Schmidt and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Science categories.
This volume emphasizes the interaction of the Cordilleran thrust belt and Rocky Mountain foreland in studies of regional structural geology, geophysics, and sedimentology from west-central Montana to Arizona. The volume outlines how the nature of the Rocky mountain foreland and its deformation affect the geometry of the Cordilleran thrust belt. Many of the structural and geophysical studies reported in this volume also address the question of which structures - forland or thrust belt - developed first in a specific region and how early formed structures influenced later ones. Several chapters address the nature and style of foreland development.
Mesozoic Assembly Of The North American Cordillera
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Author : Robert S. Hildebrand
language : en
Publisher: Geological Society of America
Release Date : 2013-01-01
Mesozoic Assembly Of The North American Cordillera written by Robert S. Hildebrand and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-01 with Science categories.
"In this well-illustrated book, Hildebrand expands upon his model for the development of the North American Cordillera detailed in Special paper 457. Starting with an overview of Cordilleran geology he goes on to provide an in depth look at how the Rubian ribbon continent was assembled. He integrates the complex geology of the Cordillera into an actualistic model involving arc magmatism, arc-continent collision, slab failure magmatism, and transcurrent motion in both Rubia and the western North American margin. While much of the focus is on the assembly of the Rubian ribbon continent, Hildebrand explores its interactions with North America during the Sevier and Laramide events and concludes that North America was the lower plate in both"--Provided by publisher.
New Publications Of The U S Geological Survey
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Author :
language : en
Publisher:
Release Date : 1984
New Publications Of The U S Geological Survey written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Geology categories.
The Cordilleran Miogeosyncline In North America
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Author : Henry V. Lyatsky
language : en
Publisher: Springer
Release Date : 2006-04-10
The Cordilleran Miogeosyncline In North America written by Henry V. Lyatsky and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-10 with Science categories.
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.
Geologic Studies Of The Cordilleran Thrust Belt
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Author : Rocky Mountain Association of Geologists
language : en
Publisher:
Release Date : 1982
Geologic Studies Of The Cordilleran Thrust Belt written by Rocky Mountain Association of Geologists and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Geochemistry categories.
Description And Development Of The Cordilleran Orogenic Belt In The Southwestern United States And Northern Mexico
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Author : Harald Drewes
language : en
Publisher:
Release Date : 1991
Description And Development Of The Cordilleran Orogenic Belt In The Southwestern United States And Northern Mexico written by Harald Drewes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Geology, Structural categories.
A tectonic synthesis of systematic changes in style and age of deformation; dirction, amount, and rate of tectonic transport, and interaction with magmatism and sedimentation.
Late Jurassic To Eocene Evolution Of The Cordilleran Thrust Belt And Foreland Basin System Western U S A
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Author : Peter G. DeCelles
language : en
Publisher:
Release Date : 2004
Late Jurassic To Eocene Evolution Of The Cordilleran Thrust Belt And Foreland Basin System Western U S A written by Peter G. DeCelles and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Continental margins categories.
Geochronological, structural, and sedimentological data provide the basis for a regional synthesis of the evolution of the Cordilleran retroarc thrust belt and foreland basin system in the western U.S.A. In this region, the Cordilleran orogenic belt became tectonically consolidated during Late Jurassic time (~155 Ma) with the closure of marginal oceanic basins and accretion of fringing arcs along the western edge of the North American plate. Over the ensuing 100 Myr, contractile deformation propagated approximately 1000 kilometers eastward, culminating in the formation of the Laramide Rocky Mountain ranges. At the peak of its development, the retroarc side of the Cordillera was divided into five tectonomorphic zones, including from west to east the Luning-Fencemaker thrust belt; the central Nevada (or Eureka) thrust belt; a high-elevation plateau (the 'Nevadaplano'); the topographically rugged Sevier fold-thrust belt; and the Laramide zone of intraforeland basement uplifts and basins. Mid-crustal rocks beneath the Nevadaplano experienced high-grade metamorphism and shortening during Late Jurassic and mid- to Late Cretaceous time, and the locus of major, upper crustal thrust faulting migrated sporadically eastward. By Late Cretaceous time, the middle crust beneath the Nevadaplano was experiencing decompression and cooling, perhaps in response to large-magnitude ductile extension and isostatic exhumation, concurrent with ongoing thrusting in the frontal Sevier belt. The tectonic history of the Sevier belt was remarkably consistent along strike of the orogenic belt, with emplacement of regional-scale Proterozoic and Paleozoic megathrust sheets during Early Cretaceous time and multiple, more closely spaced, Paleozoic and Mesozoic thrust sheets during Late Cretaceous-Paleocene time. Coeval with emplacement of the frontal thrust sheets, large structural culminations in Archean-Proterozoic crystalline basement developed along the basement step formed by Neoproterozoic rifting. A complex foreland basin system evolved in concert with the orogenic wedge. During its early and late history (~155 - 110 Ma and ~70 - 55 Ma) the basin was dominated by nonmarine deposition, whereas marine waters inundated the basin during its midlife (~110 - 70 Ma). Late Jurassic basin development was controlled by both flexural and dynamic subsidence. From Early Cretaceous through early Late Cretaceous time the basin was dominated by flexural subsidence. From Late Cretaceous to mid-Cenozoic time the basin was increasingly partitioned by basement-involved Laramide structures. Linkages between Late Jurassic and Late Cretaceous Cordilleran arc-magmatism and westward underthrusting of North American continental lithosphere beneath the arc are not plainly demonstrable from the geological record in the Cordilleran thrust belt. A significant lag-time (~20 Myr) between shortening and coeval underthrusting, on the one hand, and generation of arc melts, on the other, is required for any linkage to exist. However, inferred Late Jurassic lithospheric delamination may have provided a necessary precondition to allow relatively rapid Early Cretaceous continental underthrusting, which in turn could have catalyzed the Late Cretaceous arc flare-up.