Definition
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
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
History
Origin
Mount Kenya
France
Discoverer
J. W. Gregory
Alexandre Brongniart
Etymology
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock