Definition
Diatomite is a fine-grained sedimentary rock which is formed from consolidated diatomaceous earth
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Germany
-
Discoverer
Unknown
Alexandre Brongniart and René Just Haüy
Etymology
From diatom + -ite1
From Greek trakhus rough’ or trakhutēs roughness
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock