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Data sets Publications Expeditions Thesaurus
Marble Falls Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Marble Falls Group
RTTexas
SNLower and middle Pennsylvanian. Comprises Sloan Formation below and Big Saline Formation above. Central Texas.