diabase








noun Petrology.

  1. a fine-grained gabbro occurring as minor intrusions.
  2. British. a dark igneous rock consisting essentially of augite and feldspar; an altered dolerite.

noun

  1. British an altered dolerite
  2. US another name for dolerite

  1. A dark-gray to black, medium-grained igneous rock consisting mainly of labradorite and pyroxene. Diabase is compositionally similar to andesite, but has coarser grains. It is commonly found in sills and dikes. Also called dolerite
50 queries 0.556