Opened in 1846, the quarry boomed during the Industrial Revolution, when a 17,000-strong workforce extracted half a million tons of the gray rock per year to export across the globe. Today, only above ...
It’s a brisk day in Johannesburg, a tiny mining town in California tucked among the Rand Mountains in the Mojave Desert. The landscape is vast and rugged, a mish-mash of rock, dirt and creosote bushes ...
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