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Four samples of limestone showing halite casts from the Silurian Tonoloway Fomation limestone of West Virginia. Width of field of view is approximately 27 cm. Collected along the newly-opened section of Corridor H west of Moorefield, West Virginia, at this new roadcut: www.gigapan.com/gigapans/103106
Located in the Atacama Desert (n. Chile), this salar ("salt flat", essentially) produces enough mined salt to account for the domestic consumption of Chile plus a few million tons for export. The lower parts of the salar are essentially pure NaCl (rare, geologically speaking - usually there's a lot of other salts mi...