Definition
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
History
Origin
Indonesia
France
Discoverer
Cornish Gossen
Alexandre Brongniart
Etymology
From Cornish gossen from gos, blood from Old Cornish guit
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, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock