University of Illinois Urbana-Champaign

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Showing 1261–1290 of 28,162 items
Thumbnail for Geochemical and petrographic analysis of the Sparks Hill Diatreme and its relationship to the Illinois-Kentucky fluorspar district
Geochemical and petrographic analysis of the Sparks Hill Diatreme and its relationship to the Illinois-Kentucky fluorspar district
Denny, F. Brett; Maria, Anton H.; Mulvaney-Norris, Joseph L.; Guillemette, Renald N.; Cahill, Richard A.; Fifarek, Richard H.; Freiburg, Jared T.; Anderson, Warren, H.

Thumbnail for Bedrock geology of Murphysboro Quadrangle, Jackson County, Illinois
Bedrock geology of Murphysboro Quadrangle, Jackson County, Illinois
Jacobson, Russell J.; Denny, F. Brett; Griffith, Gary W.