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
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
History
Origin
USA, Australia
France
Discoverer
Tornebohm
Alexandre Brongniart
Etymology
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock