SCHUYLER COUNTY, 81 



By the foregoing section it will be seen that the strata intervening between 

 coals 3 and 4 are mainly sandstones and sandy shales, and the same is true at 

 some other localities, and a portion of this sandstone is a very good freestone, 

 and has been used for the construction of the jail in Rushville, and for foun- 

 dation walls in the town and in the adjacent region. This sandstone is well 

 exposed on the breaks of the streams north of Rushville, and affords nearly all 

 the building stone used in this part of the county. Coal No. 3 is not so regu- 

 lar in its development as either No. 4 above it, or No. 2 below, and is frequently 

 replaced by bituminous shales. It is worked, however, at several localities in 

 this county, where it ranges from two to four feet in thickness. On Coal creek; 

 about a mile and a-half southwest of Frederick, tunnels have been opened in this 

 seam along its line of outcrop, where the coal ranges from two to three feet in 

 thickness, but is hardly equal in quality to that from the seam above. A sec- 

 tion on this creek, shows all the beds at the base of the Coal Measures, from 

 the horizon of No. 3 coal, down to the Lower Carboniferous limestones, as 

 follows: 



FEET. 



Soft yellow limestone 2 



Bituminous shale 2 



Coal, No. 3. 2 to 3 



Shale 12 " 15 



Hard bluish gray limestone , 4 " 6 



Clay shale 1 5 " 1 8 



Coal No. 2 1 



Blue and green sandy shales 20 " 25 



Hard calcareous sandstone 10 " 12 



Ferruginous shales 6 



Calcareous shale with fossils 3 



Blue and gray shale 10 " 12 



Shaly sandstone 3 " 4 



At this point coal No. 2 is too thin to be worked, and No. 1 is wanting alto- 

 gether, its place bein? below the three foot bed of calcareous shale, which 

 contains several of the same species of fossils found in connection with coal 

 No. 1, in Fulton county. At Spillar's mine, a mile and a-half above Frederick, 

 No. 3 ranges from 30 to 3ti inches in thickness, and the coal appears to be 

 decidedly better in quality than that obtained from the same seam on Coal 

 creek. A half mile below Spillar's, the gray limestone of the St. Louis group 

 is seen just above the road at the foot of the bluff, and has been quarried to 

 supply a lime kiln at this point. The conglomerate sandstone is not repre- 

 sented here, but the ferruginous shale usually found above No. 1 coal, is found 

 here resting directly upon the limestone. 



A half mile above Frederick, all the beds, from coal No. 3 down to the base 

 of the Coal Measures, are exposed in the face of the bluff, but neither of the 

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