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. 2019
Examples from the Web for rhyolitic
Historical Examples of rhyolitic
Then came the period of rhyolitic flows, the centers of volcanic activity being as before Mts.The Yellowstone National Park
Hiram Martin Chittenden
a fine-grained igneous rock consisting of quartz, feldspars, and mica or amphibole. It is the volcanic equivalent of granite
Word Origin for rhyolite
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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