In the Americas with David Yetman

Ice, Rock, and Water: The Sierra Nevada

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California's Sierra Nevada is the largest and highest mountain range in the continental United States and, until recently, a geological puzzle. The source of colossal wealth in the form of gold and, now, water, it was a formidable roadblock to settlement of the state. Wevisit the range with renowned tectonic specialist Eldridge Moores.

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