Geological Papers. ■ 75 



1866, gave no name for either the Bandera, the Dudley or the 

 Pleasanton shales, and, as best we can determine by a careful 

 study of his report, they correspond to the lower part of his 

 Marais des Cygnes coal series, probably from his numbers 178 

 to 202 inclusive, but we are somewhat in doubt on this subject. 



Pottawatomie Stage.'" — The Pottawatomie stage is divided 

 into thirteen subdivisions, namely, Bethany Falls limestone, 

 Ladore shales, Mound Valley limestone, Galesburg shales, Den- 

 nis limestone, Cherryvale shales, Drum limestone, Chanute 

 shales, lola limestone. Lane shales, Allen limestone, Vilas 

 shales, Stanton limestone. 



Bethany Falls Limestone. — The name Bronson Forma- 

 tion was used by Adams" to designate the combination or as- 

 semblage of three distinct limestone formations which are 

 definitely marked in the southern part of the state, but which 

 come close together on the north by the thinning of the inter- 

 bedded shales, so that from the middle of eastern Allen county 

 northeastward they appear in the escarpments as one lime- 

 stone with thin shale-beds between them. These limestones 

 have caused more discussion and confusion than any other for- 

 mations in the state. In his report in 1866, Swallow con- 

 founded them with a number of overlying limestone forma- 

 tions, called them in places Well Rock series, and again the 

 Spring Rock series, and again included them in his Marais des 

 Cygnes coal series. 



When the Kansas Survey first began investigations, Bennett 

 ran a geological section west from Fort Scott and encountered 

 these three limestones in the prominent escarpment near 

 Uniontown. He recognized two shale partings and therefore 

 spoke of the limestone as forming a "triple system," which 

 term was used by him provisionally in volume I because exact 

 correlations were not definitely known. Later, Haworth and 

 Kirk named them the Erie limestone, on account of their prom- 

 inent development northwest of Erie. Still later, Adams gave 

 names to the three individual limestone formations as they 

 occur to the south, and as above stated, suggested the name 

 Bronson formation for their combination on the north, inas- 

 much as the name Erie was previously occupied. 



In 1872,'' Broadhead gave the name Bethany Falls limestone 

 to a limestone formation which, in his gener al section, is numj- 



16. Haworth, Prof. E., Kan. Univ. Geol. Surv., vol. Ill, p. 93, Lawrence. 1898. 



17. Adams, Dr. Geo. I., U. S. G. S. Bull. 238, p. 17, Washington, 1903. 



18. Broadhead, Dr. G. C, Mo. Geol. Surv. Rep., 1872, part II, pp. 76-99. 



