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dacite

   Also found in: Wikipedia 0.07 sec.
da·cite  (dst)
n.
A light gray volcanic rock containing a mixture of plagioclase and other crystalline minerals in glassy silica, similar in appearance to rhyolite.
[After Dacia.]
dacite  (dst)
A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. It is the fine-grained equivalent of granodiorite.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.dacite - a grey volcanic rock containing plagioclase and quartz and other crystalline minerals
oligoclase, plagioclase - any of a series of triclinic feldspars that form rocks
volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth


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This fault and fracture zone is also the contact between Tertiary age strongly altered andesite and rhyolite flows which have been intruded by a dacite dike and cut by stockwork quartz veins and veinlets.
Paramount Gold Reports 11.31 grams/tonne Gold and 87 grams/tonne ... by Business Wire
A group of rock chip samples collected across two old adits excavated within a mineralized dacite dike averaged 706 grams per tonne silver (22.
Paramount Gold Discovers a New Silver Zone at San Miguel, Sangre de ... by Business Wire
Three mineralization styles were sampled: 1) quartz veins from artisan workings, 2) argillically altered dacite with minor quartz veining, and 3) highly silicified unaltered dacite.
Plexmar Resources Inc.: Field Work Update by Business Wire
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