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Data sets Publications Expeditions Thesaurus
Douglas Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Upper Pennsylvanian
 ......Virgilian
 .......Douglas Group
RTIowa
 Missouri
 Nebraska
 Kansas
 Lawrence Formation
SNIncludes Stranger Formation, and Lawrence Formation. SW Iowa, E Kansas, NW Missouri, and SE Nebraska.