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aphanite |
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aphanite [ˈæfəˌnaɪt] n
(Earth Sciences / Geological Science) any fine-grained rock, such as a basalt, containing minerals that cannot be distinguished with the naked eye [from Greek aphanēs invisible] ThesaurusLegend: Synonyms Related Words Antonyms
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In hand specimen, leached, oxidized, and sheared San Diego breccia consists of cobble to boulder sized, sub-rounded aphanite clasts in a dark gray, amorphous silica matrix. Prospect pits and minor workings mark the Huichapa vein zone and its accompanying aphanite porphyry dike for approximately 1500 meters on surface. |
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