72 Kansas Academy of Science. 



difficulties were greatest, two or more geologists have spent 

 weeks and months tracing such formations a distance of only 

 a few miles. 



CHEROKEE STAGE. 



The Cherokee stage is not yet subdivided, being composed 

 entirely of the Cherokee shales. 



Cherokee Shales.' — The name Cherokee shales was given 

 by Haworth and Kirk in 1894 to a heavy bed of shales lying at 

 the base of the Coal-measures in Kansas. The name was 

 chosen on account of their prominence in Cherokee county, 

 the southeastern county of the state. 



MARMATON STAGE.' 



The Marmaton stage is subdivided into eight parts, namely, 

 the Fort Scott limestone, Labette shales, Pawnee limestone, 

 Bandera shales, Altamont limestone, Dudley shales, Coffey- 

 ville limestone, Pleasanton shales. 



Fort Scott Limestone. — The name Fort Scott limestone is 

 here applied to the two limestone beds occurring at Fort Scott, 

 with about seven feet of shale between, which beds have been 

 traced in detail both southwest and northeast to beyond the 

 state line. 



In 1894, Haworth and Kirk," in a preliminary description 

 along the Neosho river, named these rocks Oswego limestone, 

 which name was retained in volumes I and III of the State 

 Survey's reports. In his report on Kansas geology, in 1860, 

 Swallow named the lower one Fort Scott cement rock. Since 

 the first publication of the name Oswego, in 1894, it has been 

 learned that the name was previously occupied by Prosser,* 

 who used it in connection with a division of the Silurian in the 

 state of New York. As the name Fort Scott is just as appro- 

 priate on account of the rocks being so well exposed in the en- 

 virons of a city by that name, and partly on account of Swal- 

 low° having proposed the name for the lower bed, the term is 

 here adopted to replace the name Oswego, previously used by 

 this Survey. 



Labette Shales." — The name Labette shales is applied to a 

 bed of shale lying immediately above the Fort Scott limestone. 



1. Haworth & Kirk, Kan. Univ. Quart., vol. II, p. 105, Lawrence, 1894. 



2. Hawortli. Prof. E., Kan. Univ. Geol. Surv., vol. Ill, p. 92, Lawrence, 1898. 



3. Haworth & Kirk, Kan. Univ. Quart., vol. II, p. 105, Lawrence, 1894. 



4. Prosser, Prof. Chas. S., Bull. Geol. Soc. Amer., vol. IV, pp. 100, 108, 116, 1892. 



5. Swallow, Prof. G. C, Geol. of Kan., p. 25, Lawrence, 1866. 



6. Adams, Dr. Geo. I., Kan. Univ. Geol. Surv., vol. Ill, p. 36, Lawrence, 1898. 



