Which vital commodity, mined at sites like Taoudenni, was historically traded ounce-for-ounce for gold?
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In ancient times, salt was so scarce and essential for preserving food in hot climates that it was literally worth its weight in gold. Caravans of thousands of camels braved perilous desert journeys to transport heavy slabs of rock salt from Saharan mines to trade centers like Timbuktu, where it was swapped for precious metals. Photo: Taguelmoust at French Wikipedia, Wikimedia Commons, CC BY-SA 3.0.
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Source: Wikipedia (CC BY-SA)
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