1881.] 



443 



[White. 



340' 



83. Red shales and concealed 140' 0" 



84. Sandstone, coarse, brownish, visible 5' 0" 



85. Concealed 50' 0" 



86. Limestone, grayish-wliite, no fossils seen 10' 0" 



87. Silicioits Limestone (of Stevenson in Fayette and West- 



moreland, Pa.), exhibiting a wavy or current bedded 

 structure and giving forth a metallic resonance when 

 struck with hammer 30' 0" 



88. Vespertine, Pocono, or No. X, consisting of gray, current bedded, 



mostly flaggy sandstones, no conglomerates seen, nor red 

 shales ; rising at an angle of 18^ — 20^ towards the S. E. and 

 extending along the B. & O. R. R. for 58 chains, the lowest 

 laj-ers rising above R. R. level 33 chains east from the 204th 

 Baltimore m. p. Thickness, about 1150' 



89. Catskill, or No. IX, consisting of dark red shales alternating 



with red, and greenish-gray sandstones, contaiuing^^s/i remains, 

 but no molluscan seen ; rising towards the S. E. at an angle of 

 25° at top and 35° where the bottom layers come up 7 chains 

 west of the 203d m. j). thus making a vertical thickness of, 

 say 1300 



90. Chemung, consisting of alternate layers of thin, olive 



sandstones, and shales, very fossiliferous, and perfectly 

 exposed along the B. & O. R. R. in vicinity of 203d 

 m. p. ; coming up towards the S. E. at an angle of 

 35°, and at the end ,of 10^ chains the dip is in- 

 creased to 45^^, thus giving an approximate thickness 

 of Chemung down to this point of about 400' ^ 



91. Conglomerate, composed of very thin, flat, rounded 602' 



quartz pebbles, in a matrix of coarse rotten sand with | c^ 

 numerous fossil shells imbedded, very forcibly remind- 

 ing one of the Venango Lower (3d) Oil Sand ; thick- 

 ness 2' 



92. Chemung flaggy sandstones and shales continue rising 



at an angle of 45° for 16 rods further towards the S. 

 E. all perfectly exposed, and very fossiliferous ; thick- 

 ness about 200' 



93. Concealed, 13i chains, at the end of which the strata are rising 



at an angle of %2^ towards the S. E. thus making the interven- 

 ing rock thickness about 700' 



94. Conglomerate, a gray, hard sandstone, containing numerous 



layers filled with flattish, white quartz pebbles 40' 



95. As we go S. E. trom this point toward Keyser, the rocks rapidly 



increase their dip to the N. W. and at h mile from the outcrop 

 of No. 94, are vertical ; continuing thus or even slightly bent 

 over beyond the perpendicular to the end of 100 chains (1^ ms) 

 from Xo. 94. Exposures are rare in this interval, as there are 



PROC. AMER. PHILOS. SOC. XIX. 109. 3d. PRINTED JULY 14, 1881. 



