Onondaga and Old Port Formations, undivided

Includes, in descending order, the Onondaga Formation (Don), Ridgeley Member of Old Port Formation (Dor), and Shriver, Mandata, Corriganville, and New Creek Members of Old Port Formation, undivided (Dosn).
State Pennsylvania
Name Onondaga and Old Port Formations, undivided
Geologic age Devonian
Lithologic constituents

Berg, T.M., Edmunds, W.E., Geyer, A.R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.

Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000.

NGMDB product
Counties Bedford - Blair - Carbon - Centre - Clinton - Columbia - Franklin - Fulton - Huntingdon - Juniata - Luzerne - Lycoming - Mifflin - Montour - Northumberland - Perry - Schuylkill - Snyder - Union