Vines and Law (2000) interpreted the Jurassic Santa Rita Flat pluton in the Inyo Mountains in east-central California as a large-scale saddle reef emplaced in the core of a broad, south-southeast–plunging syncline. This interpretation, however, is incompatible with the geometry and probable age of the host-rock structures, the internal features of this intrusion, and the rate at which space would form in a saddle reef.

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The fundamental premise in the saddle-reef interpretation is that the Paleozoic wall rocks exposed east of the Santa Rita Flat pluton dip westward beneath the pluton and form a broad syncline into which the pluton...

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