234 • KANSAS UNIVERSITY QUARTERLY. 



1. The Pottawatomie and I)ouu;]as Formations along the 



Kansas River. 



BY AUSTIN F. ROGERS. 



The Pottawatomie and Douglas Formations are names applied 

 to the lower part of the Upper Coal Measures by Professor E. 

 Haworth. ' This paper deals with the fossil faunas of these for- 

 mations as exposed along the Kansas river. The horizons range 

 from the Bethany Falls Limestone at Kansas City, Mo., to and 

 including the Upper Oread Limestone at Lecompton, Douglas 

 county, Kansas. 



The following table^ shows the names used by the University 

 geologists and the corresponding number used in the paper: 



Douglas Formation — Oread Limestones.. 17-19 

 Lawrence Shales. . . 16 



Pottawatomie Formation — Garnett Limestones 14-15 



Lane Shales 13 



lola Limestone 12 



Thayer Shales 11 



Erie Limestones... i-io 



Broadhead,^ in 1872, assigned numbers to the different horizons 

 of the Coal Measures of Missouri. In the absence of detailed 

 stratigraphic work it is impossible to correlate these completely 

 with those of eastern Kansas. Yet where there is no doubt, as in 

 the lowermost horizons exposed at Kansas City, Mo., Broadhead's 

 numbers are given, followed by Br. 



Bennett,* in i8g6, studying the Coal Measure rocks of eastern 

 Kansas, made sections at Kansas City, Mo., Argentine, Kansas, and 

 other localities along the Kansas river. As far as they go these 

 sections are used for the description of the horizons, the words of 

 Bennett being used. The numbers used by Bennett in his Argen- 

 tine section are given, followed by Be. 



Alternating shales and unimportant limestones intervening be- 

 tween the prominent limestone systems are grouped together under 

 one number. These numbers were simply for convenience of 

 reference, as in the absence of detailed work over large areas the 

 relative importance of the horizons is unknown. 



1 Ilaworth. Univ. (Jeol. Surv. Kans.. vol. iii, p. 'M. 



2 Ilaworth. loc. cit. 



3 Broadhead. Geol. Surv. Missouri. I'rel. Rep. on Iron Ores and Coal Meld, pp. n>< et. 

 seq., 1872. 



4 Bennett. Univ. Geol. Surv. Ivans., vol. i. 18!)(), 



