Definitions

from The Century Dictionary and Cyclopedia

  • n. In mineralogy, a white, cotton-like variety of calcite occurring as an efflorescence, as at the quarries of Nanterre, near Paris.
  • n. A fine mechanical sediment resulting from the grinding together of minerals and rocks. The term is used especially to designate the constituents of the till which resemble ordinary clays in fineness of grain but differ from them in degree of oxidation.

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