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Data sets Publications Expeditions Thesaurus
Mount Simon Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Upper Cambrian
 .....Mount Simon Sandstone
RTIowa
 Illinois
 Indiana
 Ohio
 Wisconsin
 Minnesota
 Michigan
SNUnconformably overlies Precambrian basement; underlies Eau Claire Formation. Added to Thesaurus in 1989.