324 TRANS. ST. LOUIS ACAD. SCIENCP:. 



4- Coal ii 



5. Light blue fire-clay, extending to bottom of channel 3 



riiree-quarters of a mile east of the river thei'e is a series of 

 exposures in a ravine and in road-side gullies, which combine to 

 form the following section : 



II. Excello Itoail Section. 



Feet. 



1. Limestone 2 



2. Slope 3 



3. Coal li 



4. Claj and Slope, about S 



5. Hard clinking limestone with splintery fracture, about.... 2 



6. Slope ID 



7. Sandstone, generally friable but sometimes firm 7 ', 



8. Arenaceous clay (sometimes absent) i 



9. Coal, exposed 4 



The heavy coal-seam at this point was estimated at 50 feet 

 above the channel at East Fork. 



In the creek crossing this road about a mile and a half west 

 of Excello there are several exposures from which a closely coin- 

 cident section may be constructed. It extends from the clinking 

 limestone of the above section to the brown and white limestones 

 and the subjacent shales seen on Claybank creek ; and in a hill 

 just east of the Emerson coal-working, a mile west of Excello, 

 there are exposures showing that a heav}' bed of fire-clay occurs 

 below, and the heavy coal-seain above, a conspicuous bed of 

 limestone, as is the case on Claybank creek. The coal-seam at 

 this working is about 42 feet thick. 



Exposures on C/aybauk Creek. — There are several expo- 

 sures in the road from Bevier to McGee College (or College 

 Mound) in the vicinity of Claybank creek ; and there are addi- 

 tional exposures along the south side of the creek for half a mile 

 west from the road. Combined, these constitute an excellent 

 section : 



12. C'laybaiik Creek Section. 



Feet. 



1. Heavy-bedded sandstone, sometimes incoherent 4 



2. x\renaceous shale or sandy clay 1 



