Ludlowville Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
 .....Ludlowville Formation
RTNew York
 Hamilton Group
SNIn Hamilton Group. W and central New York. Includes Ledyard Shale Member; Wanakah Member. Added to Thesaurus in 1989.