Mica diorite

Definitions

  • Webster's Revised Unabridged Dictionary
    • Mica diorite (Min) an eruptive rock allied to diorite but containing mica (biotite) instead of hornblende.
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Usage

In literature:

Dark mica sometimes takes the place of hornblende (mica-diorite).
"The New Gresham Encyclopedia" by Various
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