4SS TRANS. ST. LOUIS ACAD. SCIENCE. 



The elevation of No. 5 of the last section (B) is 1315 feet; that 

 of its equivalent No. z of Sec. A, west of Greenfield, 1483 feet- 

 indicating a dip of 268 feet in about 10 miles in passing south- 

 west, or over 26 feet per mile. 



Sec. C was observed on Osborn's branch (McDowell's Gap), 

 i^ miles north of Sec. A, on line of Elk and Butler counties, as 

 follows : 



,Sec. C— I. 62 feet cherty slope, includes highest rocks observed on flint 

 ridges ; fossils observed were Hemipronites crem'stria, 

 Athyris subtilita, Productus costatus^ and Bryozoa.' 

 feet of gray shelly limestone. 

 *' of shales. 

 " rough limestone bed. 



" of shales, with bands of buff limestone containing Fu- 

 sulincB. 

 feet of shales. 

 ■' of limestone. 

 " of red shales. 

 " of shales and limestone. 

 " of rough yellowish limestone. 

 " of shales. 



" good bed of limestone. 

 " of shales. 



'• of limestone and blue chert abounding in Fustilince. 

 " of shales. 

 " of yellow limestone, 

 "of shales. 



18. 1 " of blue jointed limestone with Fusulina cylindrica. 



19. 133 " chiefly shales, includes about two limestone beds. 



20. I " dark ash-brown shelly limestone. 



21. 25 " sandstone. 



No. 20 of Sec. C corresponds to No. 18 of Sec. A, and No. 14 

 of Sec. C corresponds to No 9. of Sec. A. The FusulincB at 

 this place are very perfect, and when weathered or broken oft" 

 show the structure very finely. 



At head of Elk river, near northwest corner of Elk county, we 

 found very well preserved specimens of Hemipronites crenutia, 

 often weathered out, and a limestone bed entirely composed of it. 



At the head of Otter creek, near Carlisle Gap, I obtained fine 

 specimens of Allorisma subelegatis^ Al. topekaensis^ Myalina 

 kansasensis^ Meekella strlato-costata, Productus nebrascensis., 

 Aviculopecten occidentalis. Hemp, crenistria^ Athyris subti- 



