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For the most part, the geology at the dam is the same as all the rest of the Sierra foothills until they intersect the Tehachapi.
California’s geologic past is one of constant pressure and collisions. The foothills are also riddled with limestone caverns.
>>For the most part, the geology at the dam is the same as all the rest of the Sierra foothills until they intersect the Tehachapi. California’s geologic past is one of constant pressure and collisions. The foothills are also riddled with limestone caverns. <<
This answer is sort of a disconnect (understatement). I’ll just assume the best (intentions) on your part. Have a good day my friend.