62 STRATIGRAPHY GENERAL SECTIONS. 



Courthouse District. 



In the following section, the surface portion was measured 

 with hand level, and the lower portion, below the Sewickley 

 Sandstone, is from the record of the J. C. Collins No. 1 (428) 

 oil well, by the Crude Oil Company : 



Bealls Mills Section, Courthouse District. 



Thickness Total 



Dunkard Series (220') Feet. Feet. 



Concealed from top of knob 20 20 



Sandstone, flaggy, Lower Marietta 30 50 50' 



Concealed to level of J. C. Collins No. 1 (428) 



Well (1146' L.) 25 75 



Concealed, mostly reds 90 165 



Steep bluff, with sandstone, Waynesburg 55 220 170' 



Monongahela Series (385') 



Concealed in slope 25 245 



Sandstone, massive, Gilboy 30 275 



Concealed 25 300 



Sandstone, flaggy, Uniontown 20 320 



Concealed, with reds 65 385 



Sandstone, massive, coarse, gray, pebbly, great 

 cliff, rock, 10' visible above creek, total 

 thickness supplied from outcrop y z mile 



east, Sewickley 35 420 200' 



Unrecorded 185 605 



Section Continued in J. C. Collins No. 1 



(428) Well Record: 



Pittsburgh Coal 605 185' 



Conemaugh Series (540') 



Unrecorded 480 1085 



Big Dunkard Sand 60 1145 



Allegheny, Pottsville and Mauch Chunk Series (1070') 



Unrecorded 40 1185 



Sand, Lower Freeport 80 1265 



Unrecorded 920 2185 



Little Lime 15 2200 



Pencil Cave 15 2215 1610' 



Greenbrier Limestone (110') 



Big Lime 110 2325 



Pocono and Catskill Series (782') 



Big Injun Sand 150 2475 



Unrecorded 394 2869 



Gordon Stray Sand 17 2886 



Unrecorded 15 2901 686' 



Gordon Sand 9 2910 



Unrecorded 175 3085 184' 



Fifth Sand 7 3092 



Unrecorded to bottom 15 3107 



Total depth of well, 3032 feet. 



