Definition
Mugearite is a type of oligoclase bearing basalt, also comprising of olivine, apatite, and opaque oxides
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Skye, Scotland
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Discoverer
Alfred Harker
Alexandre Brongniart and René Just Haüy
Etymology
From mugear + -ite
From Greek trakhus rough’ or trakhutēs roughness
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Opaque Rock
Fine Grained Rock, Opaque Rock