60 



Geology of the MonovgaJicJa Valley 



Section of Rock Strata, on the West Branch of the Monongaheh 



River, near Clarhshurgh. 



r 



Slight dip to N. W.— Order, ascending. 



Fig. 9. 



J£ 



01 





Or- 

 der. 



20 



U 



140 



10 



10 



10 



9 



8 



i 



5 



ISO 



6 



5 



5 



4 



3 



3 



10 



2 



4 



1 



3'J3 leel. 



1» Limestone — full of cracks^ and containing considerable iron- 

 This stratum reposes on sandstone, in the bed of the creek. — 4 feet- 



2. Slate and slaty clay^ dark colored and containing imbedded 

 pebbles. — 10 feet. 



3. Bituminous coal, of a fine quality, rich in bitumen. — 3 feet. 

 4* Bituminous shale, and slaty shale, with vegetable Impressions. 



•5 feet. 



5. Sandstone; — fine grained — -some part of the deposit lies in thm 



beds 



180 feet- 



6. Slaty shale, dark colored and compact. — 5 feet. 



\ 



* ^ 



