Pegmatite intruding basement gneiss.

Pegmatite intruding basement gneiss

This intrusive relation lies in the footwall of the Badwater Turtleback. The pegmatite is early Tertiary in age; the gneiss is Proterozoic, but was deformed in the early Tertiary. In most other places in the turtleback, however, the gneiss was deformed during late Tertiary extension.

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