84 University of Kansas Geological Survey. 
than the Medicine Lodge gypsum!.” If this correlation be correct, 
and the general similarity of the Oklahoma gypsum with that of the 
Medicine Lodge is well shown in the descriptions of Captain Marcy 
and George G. Shumard and the accompanying plates,? then the 
Medicine Lodge gypsum is the most important division of the Red- 
beds for the purpose of classification. 
Succeeding the massive gypsum are bright red shales and sand- 
stones that are more brilliantly colored than any other part of the 
series and are admirably exposed along the bluffs of Bluff creek in 
Comanche and Clark counties. An excellent illustration of these 
biuffs is given on p. 39 of Professor Hay’s bulletin. Gypsum is not 
se abundant in this upper portion of the Red-Beds but near the top 
in Clark county is a conspicuous stratum of magnesian limestone 
called the Dog Creek dolomite by Professor Cragin. 
Jn western Sumner, Harper and Kingman counties the country 
is gently rolling and the slopes of the low hills and banks of streams 
show frequent exposures, though there are many beds of sand along 
the valleys of the streams which have been generally, and probably 
correctly, referred to the Quaternary.? In eastern Barber county 
in the buttes to the north of Sharon and the Cedar Hills to the south, 
the rugged and picturesque country of the Red-Beds begins, which 
has been so strikingly described by Professors Hay and Cragin. This 
region, with frequent steep buttes and streams lined by steep blufis, 
extends across Barber, Comanche and Clark counties to the eastern 
part of Meade. These bluffs and buttes afford numerous excellent 
sections of the upper part of this series, the thickness and general — 
lithologic characters of which may be seen in the various sections 
accompanying this Report. The best exposures of the middle part 
of the series, as well as some of the most picturesque portions of 
this country, may be seen‘in Barber county, in the Cedar Hills in the 
_ southeastern part of the county and along the steep line of bluffs 
and hills to the west of the Medicine Lodge river, especially in the 
Gypsum hills to the southwest of the city of Medicine Lodge. When 
seen from the hills to the east of Medicine Lodge, at a distance of 
1. F. W. Cragin, Colorado College Studies, Vol. VI, p. 30. 
2 Exploration of the Red River of Louisiana in 1852, published 1854, pp. 238, 165. 
See also plates 4,5 and6. (Hx. Doc. House Rep. 33d Cong., Ist Ses.) 
3 See Bulletin U. S. Geological Survey, No. 57, pp. 38-45, Washington. 
