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andesite
(an′də zīt′)
noun
a dark-colored, fine-grained, extrusive igneous rock consisting chiefly of plagioclase feldspars with some biotite, hornblende, or pyroxene
Origin: after Andes (Mountains) + -ite
See andesite in American Heritage Dictionary 4
noun
A gray, fine-grained volcanic rock, chiefly plagioclase and feldspar.
Origin:
Origin: After the Andes
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