318 GEOLOGY OF ILLINOIS. 



usually, and it is more probably No. 5. It probably underlies township 12, 

 ranges 2, 3 and 4, townsbip 11, range 2, and the southeastern part of range 1> 

 and the northern borders of ranges 3 and 4, perhaps the eastern part of town- 

 ship 10, range 4, and township 9, range 4, and the southern half of range 3. 

 The coal from this seam is generally of fair quality, but is a little harder, and 

 not as well liked as that from No. 6. 



In township 10, range 1, there is a coal seam worked in several places, which 

 may be No. 3 (?) of the Illinois section. The exposed strata in section 23 

 showed the following succession : 



FT. IN. FT. IN. 



1. Clay or clay shale, rotten. Not measured 



2. Coal 4 to 5 



3. Sandstone and shale . 10 to 15 



4. Clay shale 1 



5. Black slate 6 to 1 3 



6. Clay shale 4 



7. CoalNo.2 1 6 to 2 3 



8. Fire clay. Not measured 



Abundance of fossil plants were found in some portions of the shale overlying 

 the upper coal seam of this section, among which are, Pecopteris villosa, P.poly- 

 morpha, Neuropteris rarinervis, Stigmaria Evenii, Sphenopteris intermedia, An- 

 nulariq, longifolia, A. sphenophylloides and Pinnularia capillctcea. A.11 these 

 plants are found in connection with coal No. 2 of the Illinois section, and have 

 not hitherto been observed in connection with No. 3 in this portion of the 

 State. 



The lower seam is considered by the miners to be the same seam as that 

 worked near Avon, ten or twelve miles southeast of this, which is referred by 

 the best authorities to coal No. 2. The upper seam, at this place, agrees very 

 nearly with the one found in section 17, township 8, range 2 west, in Warren 

 county. The lower scam, No. 7 of the section, is worked in several places in 

 section 23, but the upper one only on the farm of Deacon Andrews, in the south- 

 east quarter of the section. The coal furnished by this mine is rather soft, 

 kindles easily, and has a good reputation. 



A portion of the mines worked in section 10, of this township, appear to be 

 in this seam. A section at this point gave : 



FT. FT. 



1. Calcareous clay or shale. Not measured 



2. Coal 3 to 6 



3. Calcareous clay or shale 7 to 9 



4. Coal 5 to 6 



6. Blue clay or shale, about . * .... 20 



6. Coal 2 



No. 6 of this section I consider to be coal No. 2, and No. 4 of the section 

 to be the equivalent of the upper coal in section 23. No. 2 of this section may 



