The structure of the northern Sierra Nevada, California, is a series of east-directed thrust faults modified by upright and west-directed folds and faults. The highest tectonic unit is a nappe composed of the Smartville ophiolitic complex and related rocks. These structures collectively represent the Middle Jurassic Nevadan orogeny. This overthrust-backfold model resembles Middle Jurassic events in British Columbia and the Cretaceous-Tertiary tectonics of the western European Alpine belt, and it is consistent with the hypothesis that the Nevadan orogeny reflects the collision of an oceanic volcanic arc with North America.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.