Diabase meaning
A dark-gray to black, fine-textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone.
noun
A finely crystalline, intrusive basaltic rock made up mainly of labradorite and pyroxene.
noun
Altered dolerite.
noun
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.
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