A gray fine grained volcanic rock consisting largely of alkali feldspar
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AnswerCrossword Clue
trachytesA gray fine-grained volcanic rock consisting largely of alkali feldspar
trachytefine-grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive equivalent of syenite
plagioclasea fine-grained volcanic rock of intermediate composition, consisting largely of plagioclase and one or more mafic minerals
plagioclasesPLAGIOCLASE, a fine-grained volcanic rock of intermediate composition, consisting largely of plagioclase and one or more mafic minerals
syenitesA coarse-grained gray igneous rock composed mainly of alkali feldspar and ferromagnesian minerals such as hornblende
phonolitesA fine-grained volcanic rock composed of alkali feldspars and nepheline
phonoliteA fine-grained volcanic rock composed of alkali feldspars and nepheline