138 University of Kansas Geological Survey. 
stones of the Red Bluff division, showing now and then layers of 
sandstone varying from a light gray to a greenish-gray color, and 
shales 2 feet in thickness. There is quite a strong southerly dip. 
On Mule creek about one mile below the former Gallagher post- 
oftice, near the Powell-Logan township line, is the top of the Medi- 
cine Lodge gypsum. It forms a prominent ledge along the side of 
tue creek a short distance below the present Gallagher house. To 
the southeast the gypsum stratum may be readily followed as it rises 
higher and higher in the bluffs along the creek. In this vicinity the 
tep of the Medicine Lodge gypsum is about 100 feet below the base 
of the Cheyenne sandstone. Above Gallagher’s, on the north side 
of Mule creek one mile west of Jacob Keel’s, the Cheyenne sand- 
stone is clearly exposed. The Kiowa shales are not found in place 
in this locality; but loose specimens of Gryphaea occur in the soil. 
Jacob Keel Section. 
No. Feet. 
FS OL ONE PhO OU Nel relate P Nene eee AeA Ala een ae 1 —1124 
4) Yellowish vo whitishisand stone nails eee 24—1114 
d. blackishicoybluishineyshalestemarin cairn eerie 9 —109 
Z. Yellowish to white sandstone with a layer of 20 —100 
‘yellow shale at the base. Base of Cheyenne. 
1. Red-Beds, partly covered to level of Mule creek... 80 — 80 
It will be noticed in the above section that a layer of black shale 
is given in the Cheyenne. Perhaps the 24 feet of yellowish sand-. 
stone might be regarded as a thickened layer of the sandstone 
noticed in the lower part of the Kiowa in the Stokes hill and Belvi- 
dere sections. No fossils, however, were found in the black sub- 
jacent shales either at this section or in those studied in other places, 
which fact has led the writer to refer this shale with the overlying 
sandstone to the Cheyenne formation. The Cheyenne sandstone is 
well exposed on the south side of Mule creek above William Powell's 
ranch and below the John Pyle farm at an elevation of 40 feet above 
the creek level. The formation is partly covered but shows at the 
base white sandstone, then blackish to bluish shales with red streaks 
apd a yellowish sandstone on top. Plenty of loose Gryphaea shells 
occur on the surface above the Cheyenne sandstone. This locality 
is 3 miles southeast of Wilmore and is the last conspicuous outcrop 
