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caliche

(i) A zone near the surface, more or less cemented by secondary carbonates of Ca or Mg precipitated from the soil solution. It may occur as a soft thin soil horizon, as a hard thick bed, or as a surface layer exposed by erosion. (ii) Alluvium cemented with NaNO3, NaCl, and/or other soluble salts in the nitrate deposits of Chile and Peru.

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  • Bob Adams
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