Gossan meaning

gŏsən, gŏz-
An exposed, oxidized portion of a mineral vein, especially a rust-colored outcrop of iron ore.
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Rusty iron deposits often occurring where the upper part of a vein has been weathered and oxidized.
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(geology) Decomposed rock, usually reddish or ferruginous (owing to oxidized pyrites), forming the upper part of a metallic vein.
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Origin of gossan

  • Cornish gossen from gōs blood from Old Cornish guit

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Cornish.

    From Wiktionary