168 Annals of the Carnegie Museum. 



IS 



14 

 13 



12 

 II 

 10 



Dark gray and black shale. Mason horizon. 14 ft 318 ft. lO in. 



Coal. 6 in. Mason 319 ft. 4 in. 



Gray clay-shale at the base, grading into a sandy clay above. In 



some places this bed contains a heavy-bedded sandstone. 13 ft. 332 ft. 4 in. 



Somewhat sandy gray clay-shale. 14 ft. 6 in 346 ft. 10 in. 



Thin-bedded black shale. 16 ft '. 362 ft. loin. 



Coal. Gallitzin horizon. 2 ft. The thickness is very irregular, 



varying from 2 to 4 ft 364 ft. lO in. 



Gray, structureless clay. 12ft 376 ft. loin. 



Thin-bedded sandstone, bottom not seen. 7 ft 383 ft. 10 in. 



Concealed. 15 ft.=h 398 ft. 10 in. 



Rather thin-bedded sandstone. Top not seen. Mahoning hori- 

 zon. 21 ft 419ft. Join. 



Coal. Upper Freeport horizon. 4 ft. 5 in 424 ft. 3 in. 



Structureless green clay. 6ft 430 ft. 3 in. 



Gray, thin-bedded shale, with a layer of limestone nodules at the 



top. 7ft 437 ft. 3 in. 



Heavy-bedded buff limestone. 2 ft. 6 in 439 ft. gin. 



Yellow clay shale. 5 ft 444 ft. gin. 



Notes on the Section. 



33. The basal layers of the Birmingham are a very black bituminous 

 shale. This is the horizon of the Elk Lick coal. It does not occur 

 as a coal on the eastern side of the anticline, but it may be seen in the 

 first cut west of Donohoe on the western side of the anticline. It is 

 there from 14 to 16 inches in thickness as stated in the Latrobe Folio 

 of the United States Geological Survey, page 13, 1904, but it is 150 

 feet above the Buffalo sandstone (Saltsburg of the folio) and not 50 

 feet as estimated by the writers of that folio. The coal on the eastern 

 side of Dry Ridge which in the folio is identified with the Elk Lick 

 must be either the Gallitzin or the U[)per Freeport, probably the 

 former, as it is reported as lying above a sandstone, and 3 feet 9 

 inches thick. 



30. The Ames limestone is well e.\posed in the cutting west of 

 Beatty, is full of fossils, and of typical appearance. It is accompanied 

 by a thin bed of coal, as often happens. In Dr. Stevenson's figure 

 32, page 274 of the report cited above, numbers 4 and 5 seem to be 

 the Birmingham, 6 the Elk Lick, and the coal spoken of as probably 

 occurring in 9, the Harlem. 



23. The base of the Cow Run sandstone is very uneven, and in the 

 section at the cut east of Donohoe is much higher above the Pine Creek 

 than in the cut west of Beatty. 



