Dacite definition
A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene.
noun
A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. It is the fine-grained equivalent of granodiorite.
Other Word Forms
Noun
Singular:
dacite
Plural:
dacitesOrigin of dacite
- After Dacia
From American Heritage Dictionary of the English Language, 5th Edition
- From German Dazit, from Latin Dācia (“greater Romania"). First used in 1863 by Austrian geologists Franz von Hauer and Guido Stache, in a description of the geology of Transylvania.
From Wiktionary