Definition
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
Kenyte is a variety of porphyritic phonolite or trachyte rock with rhomb shaped phenocrysts of anorthoclase with variable olivine and augite in a glassy matrix
History
Origin
USA
Mount Kenya
Discoverer
Unknown
J. W. Gregory
Etymology
From pseudo- + tachylite, a glassy rock generated by frictional heat within faults.
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock