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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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A Truly Great Valley: Ruminations on California's Most Valuable Resource

What is the most valuable mineral commodity in California, the so-called Golden State? Gold? Not hardly. We produced somewhere around 150 million ounces of the stuff over the last 160 years, netting riches for a few, and producing a sad heritage of scarred hillsides, fouled rivers and bays, and thousands of people (and their cultures) dead before their time. So what is it? California has one

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