Definition
Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
History
Origin
USA, Australia
Germany
Discoverer
Tornebohm
Van Tooren
Etymology
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
From Greek tephra, ashes from Indo-European base, to burn
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock