Definition
Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents
Mugearite is a type of oligoclase bearing basalt, also comprising of olivine, apatite, and opaque oxides
History
Origin
USA
Skye, Scotland
Discoverer
Unknown
Alfred Harker
Etymology
From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US
From mugear + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock