90 The American Geologist. August, 1905 
6. Limestone, very dark blue argillaceous 5 "0 " 
5. Limestone, 6 inches to 1 foot, with fragments 
of fossils beneath bridge 1 " " 
4. Chert, 5 inches to " 6 " 
3. Limestone, blue with fragments of fossils "6 " 
2. Chert " 4 " 
1. Limestone, thin layers below high water at the 
mouth of the creek. Farther out in the 
river a layer of chert may be seen at low 
water ? " ? " 
Total 118 " 8 " 
Numbers i to 8 represent the upper part of the Wre- 
ford limestone, a total of over io feet 4 inches. The sec- 
tion covered by the high water in the river at the time of 
our visit should be added to this in estimating its thickness 
at this exposure. Numbers 9 to 16 are the layers of the 
Matfield formation which has an aggregate thickness here 
of 67 feet 9 inches. Numbers 17 to 23 represent the Flor- 
ence flint with a thickness of 19 feet. There are 21 feet 
6 inches of the Fort Riley limestone, numbers 24 to 28, 
exposed at the top of the section. 
On the side of the hill west of Marysville the Florence 
flint and Fort Riley limestone have a combined thickness 
of about 60 feet. Resting on the limestone are 20 feet of 
red, blue, green and yellow shales followed by a compara- 
tively thin limestone. The remainder of the hill is covered 
to the top, a distance of about 40 feet. The base of the 
Winfield limestone should be found here but no traces of it 
were noticed. 
In eastern Marshall county, near Beattie, the Cotton- 
wood limestone is eight feet thick, the lower part being im- 
pure. At this locality the Florena shales are only two 
feet thick.* Above this are exposed ten feet of argillaceous 
limestones and indurated calcareous shales of the 
lower part of the Neosho member of the Garrison 
formation. Going west along the railroad from the 
outcrop of the Cottonwood limestone to what appears to 
be the Wreford limestone shown in the cut near milepost 
102 on the Grand Island R. R. the barometer showed a rise 
* Numbers 1 to 3 are the Cottonwood limestone, and 4 is the Plor- 
ena shale. Kans. Univ. Quart., ix, p. 195. 
* Kans. Univ. Quart., ix, p. 195. 
