A wall made from andesite.
andesite definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a dark-colored, fine-grained, extrusive igneous rock consisting chiefly of plagioclase feldspars with some biotite, hornblende, or pyroxene
Origin: after Andes (Mountains) plush -ite
andesite definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A gray, fine-grained volcanic rock, chiefly plagioclase and feldspar.
Origin: After the Andes.
andesite - Science Definition
A gray, fine-grained volcanic rock. Andesite consists mainly of sodium-rich plagioclase and one or more mafic minerals such as biotite, hornblende, or pyroxene. It often contains small, visible crystals (phenocrysts) of plagioclase. It is the fine-grained equivalent of diorite.