The Salt-Crossway Protocol: Halite Cartography and Border Negotiation in Sahelian Nomadic Markets

盐道协议：萨赫勒游牧市集中的岩盐地理学与边界协商

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Sahelian salt caravans navigate transnational routes using halite crystal formations whose cleavage angles index shifting sovereignty zones across Mali, Niger, and Burkina Faso.
Market stalls are arranged not by commodity type but by salt-origin isotopes, creating dynamic trade corridors that realign weekly with groundwater salinity gradients.

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