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).