cornubianite

English

Etymology

Cornubian +‎ -ite

Noun

cornubianite (countable and uncountable, plural cornubianites)

  1. (mineralogy) A dark-blue laminated rock found in Cornwall with granite.
    • 1888, Jethro Justinian Harms Teall, British Petrography: With Special Reference to the Igneous Rocks:
      Thus Dr. Boase (1) proposed the terms cornubianite and proteolite for certain varieties of rock occurring near the junctions of the sedimentary rocks and the granite.

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