Definition
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
Mugearite is a type of oligoclase bearing basalt, also comprising of olivine, apatite, and opaque oxides
History
Origin
Germany
Skye, Scotland
Discoverer
Van Tooren
Alfred Harker
Etymology
From Greek tephra, ashes from Indo-European base, to burn
From mugear + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock