n. 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. RHUD [ PJC ]
2. a stratum of calcium carbonate in the soil of an arid or semiarid region. [ PJC ]
n. 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. RHUD [ PJC ]
2. a stratum of calcium carbonate in the soil of an arid or semiarid region. [ PJC ]