Browsing Reports of Progress - Indiana Geol. Survey by Subject "Martin County"

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  • Bundy, Wayne M. (Indiana Geological Survey, 1956-09)
    Most of the iron deposits of Martin and Greene Counties, Ind. , are within the Mansfield formation (lower Pennsylvanian), but small deposits also occur in the Beech Creek limestone (upper Mississippian). Goethite, the major ...

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