Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A dark shaly limestone occurring in the Carboniferous limestone of Ireland.

from The Century Dictionary and Cyclopedia

  • n. The local Irish designation of certain beds of shales, sandstones, and clays, containing thin, unworkable seams of coal. The calp belongs to the Lower Carboniferous series. See culm.

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