Purgatoire Formation (OKKp;0)

CIMARRON- Kiowa Shale Member: Gray to black fossiliferous shale with sandstone in the upper part. Thickness ranges from 0 to 50 +/- feet. Cheyenne Sandstone Member: Massive, white to buff, fine- to medium-grained sandstone, containing some conglomerate in the lower part, from 0 to 120 +/- feet thick.

State	Oklahoma
Name	Purgatoire Formation
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Early
Original map label	Kp
Primary rock type	shale
Secondary rock type	sandstone
Other rock types	conglomerate
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Sandstone (Bed) Minor Sedimentary > Clastic > Conglomerate (Bed)
Map references	Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Unit references	Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247 Sapik, D.B. and Goemaat, R.L., 1973, Reconnaissance of the ground-water resources of Cimarron County, Oklahoma: U.S Geological Survey Hydrologic Investigations Atlas HA-373, scale 1:125,000, 3 sheets. (Geology on sheet 1 compiled by S.L. Schoff, 1943.) [http://pubs.er.usgs.gov/publication/ha373] Cederstrand, J.R., 1996c, Digital geologic map of Cimarron County, Oklahoma: U.S. Geological Survey Open-File Report 96-372, (1 diskette), URL address is: http://ok.water.usgs.gov/gis/geology [http://pubs.er.usgs.gov/publication/ofr96372] [http://ok.water.usgs.gov/gis/geology]
Geographic coverage	Cimarron