Relations between hinterland and foreland shortening: Sevier orogeny, central North American Cordillera

Article Abstract:

Research is presented concerning the relationship between the tectonics of the noncollisional deformation of hinterland and foreland in the fold-and-thrust orogen formation of central North America.

Nevada, Mountains

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Miocene unroofing of the Canyon Range during extension along the Sevier Desert Detachment, west central Utah

Article Abstract:

Apatite fission track thermochronological constraints from pre-Mesozoic rocks in the Canyon Range, west central Utah, are presented. The limitations on the timing and magnitude of exhumation of the Sevier Desert Detachment (SDD) breakaway and displacement along the SDD are shown to be significant for understanding extension in the eastern region of the northern Basin and Range province.

Miocene Epoch

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Evolution of the late Paleozoic accretionary complex and overlying forearc-magmatic arc, south central Chile (38 degrees-41 degrees S): Constraints for the tectonic setting along the southwestern margin of Gondwana

Article Abstract:

Field and geochronologic data from the late Paleozoic paired metamorphic belt and magmatic arc is presented, exposed in the Lake District of the Andean foothills and Coastal Ranges of southcentral Chile. The data brings tighter age constraints on the initiation of pre-Andean subduction processes along this area. Regional exhumation and juxtaposition of high pressure temperature and low pressure temperature assemblages took place during a time of quiescence in arc magmatism, during or prior to dextral oblique convergence over the margin between the Middle Permian and Late Jurassic.

Chile, Paleozoic Era

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