HAWORTH AND BENNETT.] General Stratigraphy. 119 
sive, forming as they do the rapid slope between two cherty 
formations. 
Characteristics.—The Matfield shales are variously colored, 
says Prosser, ““with some shaly buff, occasionally cherty, lime- 
stone, and a light-gray limestone 2 feet or so in thickness, 
which occurs about 30 feet below its top.” 
Florence Flint.9% 
The Florence flint was so named by Prosser. It lies just 
above the Matfield shales. 
Thickness.—The Florence flint ranges from 19 to 23 feet in 
thickness. 
Area.—The Florence flint has its proper area and, like the 
Wreford flint, forms a dip slope to the west for some distance. 
Its outcrop closely parallels that of the Wreford limestone. 
Characteristics.—The Florence flint is a very cherty lime- 
stone 19 to 23 feet in thickness. It is composed of thin lime- 
stones with interbedded chert, and in some places contains a 
thin, white, cellular sandstone in the middle. Fine exposures 
of this stone occur at Oketo, Grant, Valencia, and wherever 
east and west railroads cross the Flint Hills escarpment. Both 
the Florence Flint and the Wreford limestone are extensively 
used for ballast. 
Fort Riley Limestone. 
The Fort Riley limestone was so named by Swallow from 
the place which bears that name. It lies immediately above 
the Florence flint. 
Thickness.—The Fort Riley limestone has a thickness of 40 
to 47 feet. | 
Area.—The area of the outcrop of this limestone is some- 
times quite extensive, while again the plateau above it has 
lying upon it deposits of Doyle shale. 
Characteristics.—The basal part of the Fort Riley limestone 
is either shaly, or marly, or a shale. At Oketo it is a soft, shaly 
limestone or very calcareous shale. At Marysville and Junc- 
tion City it is represented by about 9 feet of fossiliferous cal- 
careous shales, while at Florence they are thinner. Resting 
upon this layer are one or two layers of thick, buff, cellular 
97. Prosser, Chas. 8.: Jour. of Geol., vol. 111, p. 773. -Unaccredited quotations 
in the giscussion of the Permian rocks are from Prosser, Jour. of Geol., vol. 
pp. 714-737. 
98. Swallow, G. C.: Prelim. Rep., Geol. Surv. Kan., p. 14. Lawrence, 1866. 
