G2 University of Kansas Geological Survey. 
northern end of the Smoky Hill Buttes where their top is about 
1360 feet A. T. 
Professor Udden has indicated a Pleistocene deposit that covers 
the central part of McPherson county and extends north along the 
valley of the Smoky Hill river to the vicinity of Salina. This de- 
posit contains bones of dMyalonyx Leidyi Lindahl, Equers Major 
De Kay and some fresh water shells.4 
The streams and arroyos of the adjoining corners of Saline, 
Dickinson, Marion and McPherson counties revealed numerous ex- 
posures of bluish, yellowish and slightly reddish shales which 
were generally regarded as belonging in the Wellington. These are 
apparently the same as the shales noted by Doctor Sharpe as ex- 
tending from the middle of Marion county to north of Smoky Hill 
river, though I do not agree with the statement that they are 
“principally red in color.’ 
The vein of the Dakota sandstone on top of Twin Hill, Plate XII, 
represents one of the Twin Hills in Delmore township, capped by 
massive Dakota sandstone. ‘The slope of the hill is covered with 
large blocks of the sandstone which have fallen from a former larger 
cap of the sandstone than the one that now remains on top of the 
hill. 
In Sumner county, in the southern tier of counties these shales 
attain their greatest known thickness and cover the greater part 
of that county. On account of the very level nature of this county 
there are no exposures of any considerable thickness, though small 
outcrops along the streams and in the steeper parts of the low hills 
are not of infrequent eccurrence. Slate creek, which flows diagon- 
ally across the county from the northwest corner to near the south- 
east portion, affords many small exposures of these shales. The 
prevailing colors of these shales are yellowish to bluish and grayish 
tints with greerish and reddish bands of some thickness. There 
are also occasional thin layers of limestone not unlike some of the 
thin limestones in the upper Marion. ‘They may be distinguished, 
however, from the underlying Marion by the general absence of 
limestones, being composed principally of argillaceous shales; and 
1 American Geologist, Vol. VII, June, 1891, pp. 340-345. See especially the map on 
p. 340. 
2 University Geological Survey of Kansas, 1895, Vol. I, p. 191. 
