1877.J <5-5 [Ashburner. 



131. Gray sliale 3" 



130. Black coal slate 2" 



129. Gray sand sliale 3'4" 



128. Black slate 4" 



127. Hard, massive gray sandstone alternating with yellow- 

 ish gray, argillaceous sand shales 15' 



Lower Member. 



136. Dark bluish-gray slaty sandstone alternating with a 



shale of close texture 22' 



125. Alternating gray, green and yellow shale 25' 



124. Green shale containing Cypricardina and Orthis. ... 5' 



[At the East end of Sideling Hill Tunnel.] 



123, Partly concealed. Alternating as above but softer 25' 



122. Hard, coarse-grained reddish-gray sandstone alterna- 

 ting with soft, yellow sandy shale 165' 



121. Coarse-grained yellow sandstone. Surfaces stained 

 with iron, alternating with grayish-brown sandstone 12' 



120. Alternating yellow, gray and green shaly sandstone. . 44' 



119. Soft yellow, sandy shale interstratified with a gray 

 tlaggy sandstone, alternating with a brown sandstone contain- 

 ing micaceous specks 50' 



118. Flaggy olive sandstone alternating with a greenisli- 

 gray sandstone containing iron concretions. Partly con- 

 cealed 42' 



117. Partly concealed. Soft green and olive sandstone alter- 

 nating with soft, yellow, flaggy and hard, massive gray sand- 

 stone containing ferruginous specks and having a distinct 

 rhombohedral fracture 440' 



Devonian. 



No IX. 



Gatskill {Ponent) Red Sandstone 2680' 



116. Concealed. Probably composed of red shales and 

 sandstone alternating with white and gray sandstones 175' 



115. Greenish -gray, slaty sandstone containing micaceous 

 specks alternating with soft, bright red shale 100' 



114. Massive, coarse-grained, reddish-gray sandstone alter 

 nating with red shale and sandstone 125' 



113. Very silicious brown hematite, thickness undeter 

 mined, but variable 



112. Partly concealed. Consisting for the most part of red 

 flaggy sandstone and shale alternating with massive yellow, 

 gray and white slialy sandstone 1520' 



111. Red, sandy and argillaceous shale; lower part contain- 



PROC. AMER. PHILOS. 80C. XVI. 99. 3n 



