CHARLES S. PROSSER 



The Cottonwood limestone and the succeeding Nos. 3, 4 and 

 5 of this quarry are fairly well shown in Fig. i. 



The Fiisulina limestone is filled with specimens of Fiisidina 

 cylindrica Fischer all the way through the massive stratum ; 



I. View of Cottonwood limestone just soutli of tlie Gilbert quarr)', northwest of 

 Auburn. The Cottonwood limestone is the heavy layer at the bottom. Then in 

 ascending order are shown Nos. 2, 3 and 4 of the section. 



but as in the Nemaha county quarry both Nos. i and 2 are 

 regarded as representing the Cottonwood limestone of Kansas. 

 The base of this quarry is forty feet higher than that of the 

 Nemaha county quarry or approximately 405 feet above the 

 Missouri River. Since it is two and one-half miles northwest of 

 the Nemaha county quarry it gives between the two a dip of 

 sixteen feet per mile to the southeast. 



In a small run a quarter of a mile north of the Gilbert quarry 

 and some seventy feet lower, the outcrop shows'a ledge of light 

 gray to buff rather hard limestone with shaly layers above and 

 below. Fossils are few. Aviculopecten occidcntalis (Shum.) M. 

 & W. and Cythere iicbrasccnsis Geinitz (?) occur in the shaly 



