rhyodacite

Encyclopedia

rhyodacite

intrusive igneous rock (solidified from a liquid state) that contains plagioclase feldspar, orthoclase feldspar, and quartz. It is abundant in the large batholiths (great masses of igneous rocks mostly deep below the surface) of the world's mountain belts. Quartz monzonite differs from granodiorite by containing more alkali feldspar, usually more biotite and less hornblende, and oligoclase instead of andesine as the plagioclase mineral.

Learn more about rhyodacite with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Explore Dictionary.com
Previous Definition: rhyniaceae
Next Definition: rhyolite
Words Near: rhyodacite
More from Thesaurus.com
Synonyms and Antonyms for rhyodacite
More from Reference.com
Search for articles containing rhyodacite
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature