In the case of Castle Rock Conglomerate, it seems groundwater met underlying, silica-rich volcanic rock. “Like a cave, only this is happening on a microscopic level,” Hagadorn said, ...

Usually, rock conglomerates are not the most durable substance and will decompose after a few millennia, but the Castle Rock conglomerates are not the same.

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Environmental advocates and local tribes in Inyo County are rallying against a proposed gold mining project that threatens to upend an expanse of California’s high desert near Death Valley ...