felsite

[fel-sahyt]

noun

a dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.

Origin of felsite

First recorded in 1785–95; fels(par) + -ite¹

Related formsfel·sit·ic

[fel-sit-ik] /fɛlˈsɪt ɪk/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for felsite

Historical Examples of felsite

The stones themselves were felsite, which abounds in the locality.
Unknown Mexico, Volume 1 (of 2)
Carl Lumholtz
In the south of the island there are sills and dykes of felsite, quartz-porphyry, rhyolite, trachyte and pitchstone.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6
Various
We found, besides, a few cores of felsite and some shapeless flakes and several fragments of large metates.
Unknown Mexico, Volume 1 (of 2)
Carl Lumholtz

British Dictionary definitions for felsite

felsite

felstone (ˈfɛlˌstəʊn)

noun

any fine-grained igneous rock consisting essentially of quartz and feldspar

Derived Formsfelsitic (fɛlˈsɪtɪk), adjective

Word Origin for felsite

C18: fels(par) + -ite 1

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

felsite in Science

felsite

[fĕl′sīt′]

A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.