108 GEOLOGY OF ILLINOIS. 



lays a seam of coal that has been worked to a limited extent in tbis 

 vicinity. This limestone is rather darker colored and more heavily 

 bedded than the Fusulina limestone of Cumberland county, and might be 

 supposed to belong to a higher level, but on comparing hand specimens 

 I found it resembled its equivalent, the limestone over the Selson coal 

 in Effingham county, rather more than it did the specimens from Cum- 

 berland. However, these upper Coal Measure limestones are somewhat 

 variable in their litholological characters, and though I did not find the 

 Fusulina cylindrica in it in Coles county, I am still incliued to believe 

 that it is a representative of that limestone. The fossils found here 

 were Spirifer cameratus, S. lineatus, Prodnctus longispinus, lipiriferina 

 Kentuckensis, Athyris subtilita, Platyostoma Peoriense, a delicate coral 

 allied to Cyathoxonia, and joints of Crinoidea. The section seen here 

 was as follows : 



Ft, In. 



Brownish-gray unevenly bedded limestone •- 8 to 10 



Dark shale '. 1 



Coal 1 to 1 3 



Clay shale 4 



Higher up stream towards the month of Brush creek, some ten or 

 twelve feet of sandy shale with bands of carbonate of iron are seen 

 under the beds in the foregoing section. 



A shaft was sunk for coal in this vicinity on the S. TV. qr. of sec. 21, 

 T. 13, E. 10, near the bank of the Embarras, the following report of 

 which was furnished to Prof. Cox: 



Ft. In. 



Drift clay 20 



Limestone 7 



Coal 1 



Clay shale (soapstone) 3 



Soft blue sandstone 5 



Clay shale 1 



Coal 8 



Clay shale 5 



Sandstone 5 6 



Coal 7 



Clay shale 2 



Hard bluish sandstone . 3 



Dark clay shale (soapstone) 26 6 



The foregoing sections on the Embarras river and the boring at 

 Charleston by the Charleston Petroleum and Mining Company, affords 

 the only data for determining the geological features of this county- 



The following is a correct copy of. the record of this boring : 



Ft. In. 



1. Soil and drift clays 55 



2. Yellow sandstone - 21 



3. Hard limestone 11 



4. Shell rock (shale?) 2 



5. Coal, Ko. 16 1 4 



6 Hardslate (shale?) 8 9 



7. Clay shale (soapstone) 13 



