dark colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals as hornblende or biotite
Crossword Clue

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AnswerCrossword Clue
andesiticdark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite
andesitesdark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite
andesitedark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite
trachytefine-grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive equivalent of syenite