gossan definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Mining rusty iron deposits often occurring where the upper part of a vein has been weathered and oxidized
Origin: Cornish gossen ; from gos, blood ; from Old Cornish guit
gossan definition by American Heritage Dictionary
An exposed, oxidized portion of a mineral vein, especially a rust-colored outcrop of iron ore.
Origin: Cornish gossen, from gōs, blood, from Old Cornish guit.