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
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture
History
Origin
Mount Kenya
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Discoverer
J. W. Gregory
Unknown
Etymology
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock