GRIMSLEY: GYPSUM IN KANSAS. ar 
middle and running out on the sides, with the trend across the entry 
and parallel with the slope of the hill. These appear to be old 
water courses. The thickness of the gypsum layer is the same as 
at Fowler Brothers’ mine, eight and one-half feet, and both rest 
upon a limestone floor. The section of the hill, which is typical 
for the region, is given in figure 1. The section given in figure 2 
was taken one mile east of the mine, and the top is ten feet lower 
than the bottom of the first section. The gypsum rock resembles 
very closely that already described, except there is an absence of 
the cutters and crystals. 
On the banks of the’Little Blue, two miles west of town, is lo- 
cated the Winter’s mine. The entry runs east and is in the hill 
about goo feet. The section, as shown in figure 3, is quite similar 
to the Great Western mine. The rock does not differ in appearance 
from other parts of this area. 
These three places are the only ones in the northern area where 
the rock is used, but it outcrops at a number of other localities 
and is struck in the various wells to the north, south and west 
of Blue Rapids; but it appears to be absent in the wells to the 
east. 
GYPSUM CITY AREA, 
In the northern part of the area, six miles southwest of Solomon 
City, on Gypsum creek, is located the mine and mill of the Crown 
Plaster Company, ‘The workable stratum of gypsum is five feet, 
and it is covered by forty feet of shales and gypsum layers which 
are much folded and broken. The entry is twenty feet above the 
water in the creek and is driven 1 15 feet east with two north entries 
eighty feet in length. The upper part of the stratum is similar to 
the northern gypsum, but 
the lower portion is very 
compact and is dotted with 
elliptical crystals of yel- 
lowish-brown selenite with 
the greater length in the 
direction of the vertical 
Crystal axis(c), as represent- 
ed in figure 4. Thecrystals 
are nearly one inch long 
‘and one-half inch wide, and 
Figure 4. Solid, massive gypsum, contain- 
8lve an appearance some- ing rounded and irregularly placed crystals of 
. gypsum, 
What like the bird’s eye SY! 
limestone of the eastern United States. 
