Definition
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Etymology
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Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
From Cornish gossen from gos, blood from Old Cornish guit
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Western Australia, Minnesota
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Coarse Grained Rock, Opaque Rock