56 University Geological Survey of Kansas. 
rooms sixteen feet square. In 
the mine there is a water course 
which runs south of west, and 
in its vicinity the roof dips ee EB Sales 
down into the gypsum rock al- eee hiinocionc 
most cutting it out. Twenty- aS 1Blve Shale 
five men are employed at the 
mine and mill and forty to fifty Red Shale 
tons of rock are taken out in a = 
day. |S Red @Blue 
Shale 
A section at the mine, Fig- 
ure 3, shows a compact lime- 
stone floor on which rests the 
sypsum layer 8 «tO 9 feet in Fia. 3. Geologic Section at Winter’s 
thickness. This is covered by ABE oes 
about 10 feet of red and blue 
shales, and two limestones of 2 and 3 feet thickness separated 
by 11 feet of shales and shaly limestone. The gypsum rock is 
similar to the other exposures already described, and the cut- 
ters and crystals are absent. 
OTHER EXPOSURES. 
Gypsum is reported in the various wells to north, south, and 
west of Blue Rapids, but appears to be absent in the wells to 
the east. The stratum is probably continuous over a large area 
around Blue Rapids. It is reported in wells at Herkimer, west 
of Marysville, at 80 feet below the surface. On the Axtell farm, 
three miles north of the Great Western mine, it was struck at 90 
feet below the surface. It was found on the Lee farm, west of 
Blue Rapids, and three-fourths of a mile south of Winter’s mill, 
at 60 feet below the surface. Gypsum is reported in many other 
wells, though it is not always possible to tell how much reliance 
can be placed upon the reports, which are often based upon 
peculiar taste of the water, which might be caused in other 
ways. ‘The evidence, however, shows a large gypsum area, 
though the actual outcrop along the streams is small, as shown 
onthe map. Plate II. This is caused in part by the soft char- 
