Definition
Diatomite is a fine-grained sedimentary rock which is formed from consolidated diatomaceous earth
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
History
Origin
Germany
Germany
Discoverer
Unknown
Van Tooren
Etymology
From diatom + -ite1
From Greek tephra, ashes from Indo-European base, to burn
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock