terms:basalt
A fine-grained igneous rock dominated by dark-colored minerals, consisting of plagioclase feldspars (a calcium-sodium-aluminum-silicate, usually present in amounts over 50%), and ferromagnesium silicates. Basalts and andesites represent about 98% of all extrusive igneous rocks.
terms/basalt.txt · Last modified: 2023/11/22 08:39 by 127.0.0.1