[ dā′sīt′ ]
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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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
How to use dacite in a sentence
I wonder if they are visible from the dacite elevation on which SHE lives.Of All Things|Robert C. Benchley
The lavas and ashes ejected by these volcanoes consist of liparite, dacite, andesite and basalt.
Dacite is the lava of Krakatoa and some of the volcanoes of Japan.Volcanoes: Past and Present|Edward Hull