definisi
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Etimologi
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diabase punika rock igneous nggoleki-grained kang dumadi saka biasane pyroxene lan Feldspar
christian Leopold von Buch
rock grained nggoleki, medium rock grained, rock opaque
trachyte punika rock vulkanik nggoleki-grained werna abu-abu kang utamané dumadi saka Feldspar alkali
Alexandre brongniart Rene Hauy
saka trakhus greek atos 'utawa roughness trakhutēs
awet rock, medium atose rock
rock grained nggoleki, rock opaque