Keyser Formation through Mifflintown Formation, undivided (PADSkm;19)

Keyser Formation through Mifflintown Formation, undivided

In descending order: Keyser Formation--limestone; Tonoloway Formation--limestone and interbedded shale; Wills Creek Formation--interbedded shale, siltstone, limestone, and dolomite; Bloomsburg Formation--grayish-red and greenish-gray shale, siltstone, sandstone, and mudstone; Mifflintown Formation--interbedded shale and limestone.

State	Pennsylvania
Name	Keyser Formation through Mifflintown Formation, undivided
Geologic age	Devonian and Silurian
Lithologic constituents	Major Sedimentary > Clastic > Mudstone (Bed)Bloomsburg Formation--grayish-red and greenish-gray shale, siltstone, sandstone, and mudstone; Sedimentary > Carbonate > Limestone (Bed)Tonoloway Formation--limestone; Wills Creek Formation--limestone; Mifflintown Formation--interbedded shale and limestone. Sedimentary > Clastic > Mudstone > Shale (Bed)Tonoloway Formation--interbedded shale; Wills Creek Formation--interbedded shale; Bloomsburg Formation--grayish-red and greenish-gray shale; Mifflintown Formation--interbedded shale Minor Sedimentary > Clastic > Sandstone (Bed)Bloomsburg Formation--grayish-red and greenish-gray shale, siltstone, sandstone, and mudstone Sedimentary > Clastic > Siltstone (Bed)Wills Creek Formation--interbedded shale, siltstone, limestone, and dolomite; Bloomsburg Formation--grayish-red and greenish-gray shale, siltstone, sandstone, and mudstone. Sedimentary > Carbonate > Dolostone (Bed)Wills Creek Formation--interbedded shale, siltstone, limestone, and dolomite
References	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	NGMDB product page for 34341
Counties	Blair - Centre - Clinton - Franklin - Fulton - Huntingdon - Juniata - Lycoming - Snyder

Keyser Formation through Mifflintown Formation, undivided

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.