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Native American and Spanish explorers used High Desert minerals long before the arrival of the white man.
Native American and Spanish explorers used High Desert minerals long before the arrival of the white man.
Some of the oldest rocks in California are found in the Shadow Mountains, ranging in age from about 550 million to about 400 million years before present. These rocks have been subjected to numerous episodes of our earth’s dynamics. The latest episode which stretched, compressed, recrystallized, folded, and intruded these rocks happened about 70 million …continue reading…