58 University Geological Survey of Kansas. 
western portions of the area; the second one over the central 
and southern part; and the third is found only in the southern 
part. The interval between the middle and lower deposits is 
100 feet, and between the middle and upper it is 40 feet. The 
dip of the gypsum is nearly west, varying from 6 to 12 feet to 
the mile. 
SOLOMON MINE. 
In the northern part of the area, six miles southwest of Solo- 
mon, on the bank of Gypsum creek, is located the mill and mine 
of the Crown Plaster Company, shown in Plate XV. A section 
of the hill at the mine, repre- 
sented in Figure 4, shows 40 
feet of shales and gypsum. 
The mine entrance is 15 feet 
above the water in the creek, 
and the stratum worked is 5 
feet thick, underlaid by about 
4 feet of shaly limestone. Be- 
low this there is a series of 
see shales with a 3-foot stratum of 
= : ee gypsum. The roof of the mine 
| is a compact, dark shale with 
Fic. 4. Geologic Section at Solomon a thickness of 3 feet. Above 
Gypsum Mine. this come 23 feet of buff shales 
and 2 feet of gypsum. There 
is an alternation of shales and gypsum to the top of the hill. 
The shales with the intercalated gypsum layers are folded and 
broken. The folds extend down into the mine, causing the 
shales of the roof to cut out the gypsum in many places, so that 
the mine has now, in 1898, been abandoned. ‘The dip of the 
gypsum is north, toward the creek. 
The lower part of the heavier gypsum layer is very compact 
and filled with oval crystals of yellowish brown selenite, having 
the greater length in the direction of the vertical crystal axis. 
The crystals are laminated by the pronounced pinacoidal cleay- 
age. The larger ones are about seven-eighths of an inch long 
and half an inch wide, and rock specimens from this portion of 
es estone 
as 
\Y 3’ 
76 RY\ \\\ \\\ We Gypsum 
