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doc Definition of dolerite
    English to English
    noun
  • A dark-colored, basic, igneous rock, composed essentially of pyroxene and a triclinic feldspar with magnetic iron. By many authors it is considered equivalent to a coarse-grained basalt.
  • source: Webster 1913
  • A dark, crystalline, igneous rock, chiefly pyroxene with labradorite.
  • source: Webster 1913
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