Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali 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
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Mount Kenya
Discoverer
Alexandre Brongniart and René Just Haüy
J. W. Gregory
Etymology
From Greek trakhus rough’ or trakhutēs roughness
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock