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Diabase vs Variolite - What's the difference?

diabase | variolite |

In geology terms the difference between diabase and variolite

is that diabase is a fine-grained igneous rock composed mostly of pyroxene and feldspar while variolite is a kind of diorite or diabase with embedded whitish spherules, which give the rock a spotted appearance.

diabase

English

Noun

(wikipedia diabase) (-)
  • (geology) A fine-grained igneous rock composed mostly of pyroxene and feldspar

    • Synonyms

    * dolerite

    variolite

    English

    Noun

  • (geology) A kind of diorite or diabase with embedded whitish spherules, which give the rock a spotted appearance.
    • (Webster 1913)