60 



Geology of the Monongaliela Valley. 



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

 River, near Clarksburgh. 



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



Fig. 9. 



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 thin 

 beds. — 180 feet. 



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



