orthid

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English

fossil orthids

Noun

orthid (plural orthids)

  1. (zoology) A brachiopod shell of the genus †Orthis (or allied genera) in the family †Orthidae.
  2. (soil science) A mineral soil with ochric epipedon that does not have an argillic or natric horizon.
    • 1977, Soil Survey Horizons - Volumes 18-19, page 23:
      —orthid, great group with a horizon with an accumulation of salts more soluble than gypsum.
    • 1977, Russell Moore, ‎Thomas Mills, An environmental guide to western surface mining - Parts 1-2, page 13:
      Orthid soils are used for grazing or are irrigated for crop production if water is available.
    • 2012, H. Barth, ‎P. L'Hermite, Scientific Basis for Soil Protection in the European Community, page 79:
      When drained, they are comparable in sensitivity to orthid luvisols in an A horizon with a very low clay content.

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