Definition
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
History
Origin
USA
Germany
Discoverer
Unknown
Van Tooren
Etymology
From pseudo- + tachylite, a glassy rock generated by frictional heat within faults.
From Greek tephra, ashes from Indo-European base, to burn
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard 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