Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A soft, porous deposit of impure hydrous oxides, such as goethite, formed in bogs, marshes, shallow lakes, and swamps through precipitation from iron-rich water and the oxidizing action of algae, bacteria, or the atmosphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology
deposits of mixedoxides andhydroxides of iron formed when iron-bearinggroundwater emerges onto the surface
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