dacite
[dā′sīt′]
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.
The American Heritage® Science Dictionary
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Examples from the Web for dacite
Historical Examples of dacite
I wonder if they are visible from the dacite elevation on which SHE lives.
Of All ThingsRobert C. Benchley
Dacite is the lava of Krakatoa and some of the volcanoes of Japan.
Volcanoes: Past and PresentEdward Hull
The lavas and ashes ejected by these volcanoes consist of liparite, dacite, andesite and basalt.