Abstract

The Late Jurassic Nevadan orogeny has long been considered responsible for much of the deformation that occurred in the central Sierra Nevada. On the basis of our recent work and that of other workers, we suggest that the intensity of Nevadan deformation in the central Sierra Nevada decreases eastward within the foothills belt, is restricted to domainal deformation in rocks between the Melones fault zone and the batholith, and is virtually absent in the continental volcanic arc along the east side of the range. These data and interpretations suggest that in the central Sierra Nevada, Nevadan deformation does not represent as intense and widespread an orogeny as originally supposed.

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