Sunbury and Bedford Formations, Undivided

Shale and siltsone; shale, black to brownish-black, carbonaceous in upper one third of interval, gray to bluish-gray, clayey with occasional siltstone lamina and thin beds in lower two-thirds of interval.
State Ohio
Name Sunbury and Bedford Formations, Undivided
Geologic age Devonian and/or Mississippian
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed, Carbonaceous)black to brownish-black, carbonaceous in upper one third of interval, gray to bluish-gray, clayey with occasional siltstone lamina and thin beds in lower two-thirds of interval.
Minor
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed, Carbonaceous)black to brownish-black, carbonaceous in upper one third of interval, gray to bluish-gray, clayey with occasional siltstone lamina and thin beds in lower two-thirds of interval.
Incidental
Sedimentary > Clastic > Siltstone (Bed)occasional siltstone lamina and thin beds in lower two-thirds of interval.
References

Slucher, E.R., (principal compiler), Swinford, E.M., Larsen, G.E., and others, with GIS production and cartography by Powers, D.M., 2006, Bedrock geologic map of Ohio: Ohio Division of Geological Survey Map BG-1, version 6.0, scale 1:500,000.

NGMDB product
Counties Fulton - Henry - Lucas - Williams