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