154 GEOLOGY OF ILLINOIS. 



Ft- In- 

 Light bine limestone ■. 4 6 



Gray I imestone 4 



Black shale (probably coal) 1 



Liniestone with fossils ,22 6 



Black slate and coal 3 



iFire- clay - 3 



Clay shale 1 



Limestone 4 



Soft slaty sandstone 30 



Bine shale 12 



Black and white sandstone 4 



Black slate and bituminous limestone 2 



Coal (No. 10.) 6 



iFire-clay 6 



Hard and soft liniestone— dark-ash color 12 



Soft sandstone 6 



Slate 5 



Hard black and white sandstone 7 



Black slate and coal 1 



Blue and red sandstone 2 



Shaly sandstone 38 



Blu e slate 10 



Black slate and coal 1 



Fire-c'ay 6 



Soft liniestone (Carlinville bed ?) 5 



Sandstone IS 



Coal impure— No. 9 4 



Sandstone 23 



Bituminous shale 1 



Coal— No. 8? 4 



Blue shale 3 



Limestone 6 



Shale 24 



Shale with numerous iron bands 42 8 



Blackslate 4 li 



Shale 1 



Limestone — hard 3 



Shale and iron bands 8 6 



Liniestone— solid 4 6 



Shale 2 



Nodu 1 ar lira estone 1 6 



Shale with nodules of black limestone 4 



Black shale with fossil shells 12 



iFire-clay 3 



Gray shale 19 



Coal 3 



Fire-clay 1 6 



Nodular limestone - 4 



Shale and sandstone, about 40 



Coal 1 6 



Sandstone and some shale 45 



CoaL with shaly parting, No ! 5 



Building Book.— On East Fork, about sec. 26, T. 8 K, R. 3 W., there 

 is a tolerably good bed of hard bluish limestone. On Rocky Branch, 

 east of Litchfield, there are extensive quarries of pretty good limestone, 

 the beds are rather irregular, but the rock is very extensively used for 

 ordinary stone work and makes very good lime. North of the railroad, 

 on the West Fork, there are several outcrops of a brown and gray lime- 



