STRATIGRAPHY THE POTTSVILLE SERIES. 



Thickness Total 

 Feet. Feet. 



Shale, blue ...................................... J? 



Sand, white, very hard (Eagle) .................. ^ 



Dark sandstone and Coal, (Eagle) ............... 



Sand, white ............ 22 ' ^ (Decota) ......... 30 486 



Shale, fr?port'ed" black 'in Well No. 597), (Eagle). 108 594 



Coal, soft, (Lower War Eagle) .................. 4 



Oil sand (Upper Gilbert) 



5 



Shale, mixed .................................... 6i > 



Coal, soft, (Gilbert) 



Sand, gray, Lower Connoquenessing, (Nuttall, top 

 of New River Group) 



20 



Coal, Sharon (Hughes Ferry, Lower Douglas).... 



Mauch Chunk Series (102') 



Sand shale, very hard, limy nature .............. 66 



Shale.red ....................................... 



Lime, blue 



Oil sand, Maxton (fine flow of gas) 



Sand, blue 





Shale, red ...................................... * 



Shale, blue ...................................... 



Shale, red and blue ............................. 



The correlation of the Sharon Coal in the section above is 

 founded on the hypothesis of I. C. White and David White 1 , 

 that the expansion of the Upper Pottsville, or Kanawha 

 Group, takes place in the Mercer Group of coals, lying be- 

 tween the Homewood and Lower Connoquenessing Sand- 

 stones, based upon the presence of plant fossils in the roof 

 shales of the Sharon in Pennsylvania and eastern Ohio similar 

 to those found above the Hughes Ferry Coal in Nicholas 

 County, West Virginia. According to Hennen 2 . this view is 

 strengthened by the fact that Lingulae, a type of -marine fos- 

 sils, are common in the roof shales of the Lower Douglas 01 

 Hughes Ferry Coal, in McDowell County, a form that is rt- 

 ported common in the roof shales of the Sharon in Maryland 

 by Dr. Price. As stated before, the isolated position of the 

 Lewis County panhandle makes the correlations of the above 

 section only provisional and subject to correction when fur- 

 ther work is done in the adjoining counties. 



'I. C. White, Vol. II (A), W. Va. G. S., p. 252; 1908 

 "Ray V. Hennen, Wyoming-McDowell Rept., W. Va. G. S., pp. 184-5; 

 1915. 



