198 



C. S. Prosser — Names for the formations 



Conemaugh 

 About 650'. 



Allegheny 

 300'. 



187' 



4' 

 112' 



32' 



2' — 



85' 



2' — 3' 



...... 



ii' 



55' 



30' 



"if 



Sandy and bituminous shales and sand- 

 stones. 



Barton (Four-foot) coal. 



Shales, fire-clay and thin bedded sand- 

 stone. 



Partly sandstone, (Upper Mahoning 

 sandstone.) 



Mahoning coal. 



Massive sandstone alternating with 



shales. Mahoning sandstone. 

 Upper Freeport (Thomas) coal. 



Fire clay and shales. 



Coal 



Shales and sandstones. 



Upper Kittanning (?) coal. 



Shales and sandstones. 



Lower Kittanning or Davis (Six-foot) 

 coal. 



Shales and sandstones. 



Split Six-foot coal. 



Fire clay, shales and thin bedded sand- 

 stones. In part of the field there 

 is the massive Homewood or Pied- 

 mont sandstone at top of the 

 Pottsville conglomerate.* 



In Jennings and Braddock runs and on Dans Mountain there 

 are two beds of coal near the base of the Allegheny formation 

 which, apparently do not occur in the lower part of Georges 

 Creek valley in the vicinity of Westernport and Piedmont. 



The section of the lower part of the Allegheny for this part 

 of the field is approximately as follows : 



* A more detailed account of these formations may be found in the report by 

 the Maryland Geological Survey on Allegany County, 1900, pp. 115-130, 166-180. 



