5O STRATIGRAPHY GENERAL SECTIONS. 



The following section was measured with aneroid descend- 

 ing a steep hill road at the head of the right hand fork of Buck- 

 hannon Run, two miles northwest of Lorentz. The section 

 shows a large amount of red shale where sandstones are fre- 

 quently found. The position of the Pittsburgh Coal is some- 

 what doubtful as the exposure seems too far below the Red- 

 stone and may have been a slip : 



Lorentz Section, Hackers Creek District. 



Thickness Total 



Dunkard Series (215') Feet. Feet. 



Unrecorded from top of knob 200 200 



Sandstone, flaggy, Waynesburg 15 215 215' 



Monongahela Series (425') 



Shale, red 30 245 



Sandstone, shaly 5 250 



Shale, red 5 255 



Sandstone, massive, Gilboy 5 260 



Shale, red 30 290 



Sandstone, shaly, Uniontown 20 310 95' 



Shale, red 20 330 



Sandstone, shaly 5 335 



Shale, red 50 385 



Sandstone, flaggy, Arnoldsburg 20 405 



Shale, red and variegated 50 455 



Sandstone, flaggv, Sewickley .- 40 495 185' 



Shale, variegated 30 525 



Sandstone, shaly, Cedarville 41 566 



Coal opening, Redstone (Ira Queen Mine No. 



59 on Map II, 1270' B.), estimated 4 570 75 



Shale and concealed 35 605 



Shale, sandy 35 640 



Coal blossom (in place?) Pittsburgh 640 



Conemaugh Series (115') 



Shale, sandy, with shaly sandstone 29.5 669.5 



Coal (0' 6"), Little Pittsburgh (1170' B.) 0.5 670 100' 



Fire clay shale and shale, variegated 20 690 



Sandstone, shaly, Connellsville 15 705 



Shale, red, with sandy streaks, to road forks at 



foot of hill 50 755 



The following section, arranged in descending order, was 

 made with hand level at Gaston, and starts at the top of Purga- 

 tory Knob, one mile northeast of the town. Being in the Grass- 

 land Syncline, the section shows a considerable thickness of 

 the Dunkard Series,, its basal member, the Waynesburg Sand- 

 stone, being easily recognized by its pebbly structure : 



