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Cayugan  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Upper Silurian
 .....Cayugan
NTTonoloway Limestone
 Williamsport Sandstone
RTKeyser Limestone
SNProvincial series, North America. Above Niagaran, below Ulsterian (Devonian).