01 n. a deposit of sand or clay on the surface containing crystallized salts such as sodium chloride or sodium nitrate; -- used especially of the…
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1.
a deposit of sand or clay on the surface containing crystallized salts such as sodium chloride or sodium nitrate; -- used especially of the sodium nitrate deposits of Chile and Peru.
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2.
a stratum of calcium carbonate in the soil of an arid or semiarid region.