- a fine-grained igneous rock rich in silica: the volcanic equivalent of granite.
Origin of rhyolite
1865–70; rhyo- (irregular < Greek rhýax stream of lava) + -lite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rhyolite
Rhyolite and other forms of lava were last spread over the region.Your National Parks
Enos A. Mills
"Better in the little cemetery at Rhyolite," answered the other.The Boy With the U. S. Survey
Surface eruption of quartz-porphyry, rhyolite, and andesite.
It is not improbable that this was a quarry site; an outcrop of rhyolite is close at hand.The Topanga Culture Final Report on Excavations, 1948
A. E. Treganza
It then cools quickly and forms finely crystalline rocks of the rhyolite and basalt types.The Economic Aspect of Geology
C. K. Leith
- a fine-grained igneous rock consisting of quartz, feldspars, and mica or amphibole. It is the volcanic equivalent of granite
C19: rhyo- from Greek rhuax a stream of lava + lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A usually light-colored, fine-grained extrusive igneous rock that is compositionally similar to granite. It often includes flow lines formed during the extrusion.
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