Brallier Formation and Harrell Shale, undivided

Brallier Formation : predominantly olive-gray to dark, thickly laminated marine shale, with considerable siltstone and thin sandstone lenses; mainly nonfossiliferous. Harrell Shale: dark gray to black thinly laminated to fissile shale. Calcareous shale and limestone lenses near the base (Tully).
State West Virginia
Name Brallier Formation and Harrell Shale, undivided
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Lens)Brallier Formation : with considerable siltstone and thin sandstone lenses; mainly nonfossiliferous.
Sedimentary > Clastic > Mudstone > Shale (Calcareous)Brallier Formation : predominantly olive-gray to dark, thickly laminated marine shale; Harrell Shale: dark gray to black thinly laminated to fissile shale. Calcareous shale and limestone lenses near the base (Tully).
Minor
Sedimentary > Clastic > Sandstone (Lens)Brallier Formation : with considerable siltstone and thin sandstone lenses; mainly nonfossiliferous.
Incidental
Sedimentary > Carbonate > Limestone (Lens)Harrell Shale: Calcareous shale and limestone lenses near the base (Tully).
Comments Printed map has no indiviual description for this unit and no name, but has individual symbol and color. Only uses brackets to combine Db and Dh. Dbh is used in digital map, so combined Db and Dh together and called this the "Brallier Formation and Harrell Shale, undivided". Combined thickness: Northeastern 1300-2470 ft, Western 1410 ft, Southeastern 450-1700 ft
References

Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968 (slightly revised 1986), Geologic Map of West Virginia: West Virginia Geological and Economic Survey, Map 1, East Sheet, scale 1:250,000.

NGMDB product
Counties Berkeley - Grant - Hampshire - Hardy - Mineral - Morgan - Pendleton