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