Definition
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
Trachyandesite is an extrusive igneous rock.
History
Origin
Pike County, U.S
Indonesia
Discoverer
Unknown
Unknown
Etymology
From French, from peridot + -ite
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock