66 STRATIGRAPHY GENERAL SECTIONS. 



Thickness Total 

 Feet. Feet. 



Slate 126 3061 243' 



Fifth (Bayard?) Sand 14 3075 



Unrecorded to bottom 16 3091 



Skin Creek District. 



The following section, arranged in descending order, was 

 measured with hand level up a steep hill west of Pringle Fork 

 of Stonecoal Creek, 1.2 miles north of Snyder Schoolhouse: 



Stonecoal Section, Skin Creek District. 



Thickness Total 



Monongahela Series (133') Feet. Feet. 



Concealed from top of knob 20 20 



Sandstone, coarse, partly concealed, Sewickley 40 60 60' 



Concealed 38 98 



Bench, Redstone Coal horizon 98 



Concealed 35 133 



Bench, Pittsburgh Coal horizon (1519' L.) 133 73' 



Conemaugh Series (387') 



Concealed 38 171 



Sandstone, shaly, Lower Pittsburgh 20 191 



Concealed, mostly variegated shale 77 268 



Sandstone, shaly, 'Lower Connellsville 17 285 152' 



Concealed, with variegated shale 55 340 



Sandstone, M organtown 20 360 



Shale, sandy, and concealed 35 395 



Coal, opening abandoned, thickness concealed, 



Elk Lick (1257' L.) 395 110' 



Concealed 5 400 



Sandstone 5 405 



Concealed and shale 35 440 



Sandstone, Grafton 10 450 55' 



Concealed, mostly green shale, with plant fos- 

 sils at top 55 505 



Sandstone, massive, Saltsburg, to Pringle Fork 15 520 



The following section, arranged in descending order, was 

 measured along the strike of the measures, northeastward up a 

 high hill, starting 1.5 miles northwest of Vandalia : 



Vandalia Section, Skin Creek District. 



Thickness Total 



Monongahela Series (297') Feet. Feet. 

 Concealed, with sandstone fragments, from top 



of knob 35 35 



Sandstone, greenish brown, flaggy, Uniontown 38 73 73' 



Concealed along slope 12 



Sandstone, green, fine, Arnoldsburg 11 96 



