1880.1 113 



[Jones. 



The existence of a green shale and sandstone deposit of 200 feet, under- 

 lying the Conglomerate series and carrying an undeniable print of its rela- 

 tion to the Mauch Chunk shale in the red-hued earth topping it. 



The most noticeable feature is the doubling of the red shale and lime- 

 stone deposit of XI. There are two distinct series, under no condition 

 possibly to be confounded or misidentified. The upper of 375 feet, red 

 shale and black (fossil), red and graj^ limestone of 200 feet underlying ; 

 the lower of 2000 feet red strata and 450 feet gray limestone. Both series 

 being fossiliferous in the upper part. 



Another feature is the shale, flint and iron ore deposit, 300 feet, under- 

 lying the foregoing groups and separated from the red rocks of IX by the 

 only heavy sandstone (Pocono SS.) at this horizon. It is a pure, hard, 

 solid white rock. 



Section of strata from Lower Barren Measure to Pocono Sandstone, as 

 found on George's Greek and the Potomac River, Western Maryland and 

 Virginia, June, 1880. 



24' Sandstone. See base of Prof Tyson's Section, Plate VI, Report 

 II. H. H., Second Geological Survey, Penna. The strata from this 

 sandstone to the Pittsburg seam and higher are there given. 

 39' Shale. Lower three feet contains Neuropteris, Calamites. Pecopteris. 

 6" Slate Bland fine gr., containing Xeuropteris angustifolia, Loschii 

 and tenuifolia. 

 3' 3" Goal. iTam^^s/iM'e .SettTO., probably same as Coleman bed of Somer- 

 set Co., Pa. It is 3' 3" at Barton, 4' 10" near Piedmont, 5' on Savage 

 river near Bloomiugtou, 3' 10" on Sharpless Hill, ten miles to the 

 southward. It is probably the "Rock Coal" of Millersburg, Pa. It 

 is characterized by bottom slate, shale roof, salmon-colored ash from 

 lower bed, and ferns. It is the most widely known bed in the basin ex- 

 cept the Six foot (Kitt.). It is 388 feet below Pittsburg seam. Barton ; 

 4' 10" at Moore's run, 347 feet Hampshire Co., Virginia, workings near 

 Piedmont. It runs from 2.5% ash at bottom to 15% ash at top of 

 bed; and sulphur in same relations from .57% to 1.75%. 

 10' Fire-clay containing more or less balls of iron. Blue color. 

 6' Limestone. 

 15' Sandstone. 

 12' Shale. 

 10' Sandstone, 

 3' 2" Goal. BartletVs Bun seam. 

 10' Black slate. 

 6' Shale. 



4' 9" Fire-clay. Impure. 

 9' 9" Sandstone. 

 9' Gray shale. 



6' 2" Marius shale. One foot fossiliferous limestone at top. 

 4" Goal. 



PROC. AMER. PHILOS. SOC. XIX. 107. O. PRINTED NOVEMBER 4, 1880. 



