Definition
Diatomite is a fine-grained sedimentary rock which is formed from consolidated diatomaceous earth
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
History
Origin
Germany
Pike County, U.S
Discoverer
Unknown
Unknown
Etymology
From diatom + -ite1
From French, from peridot + -ite
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock