Raymond: Sections in the Conemaugh Series. 173 



scale being one inch to 120 feet and the horizontal one inch to 600 

 feet. The upper diagram on the plate is a continuation of the lower. 

 The Ames limestone is exposed just about where the 900 foot con- 

 tour crosses Woodlawn Avenue, near the corner of Beaver Street, Alle- 

 gheny, about one-fourth of a mile from the station at Wood's Run. 

 Descending to the station the following section is obtained : 



10. Sand and gravel in the old river bed. 27 ft. 



9. Shaly limestone with many marine fossils. 5 ft. Ames horizon. 5 ft. 



8. Coal. Harlem horizon. 18 in 6 ft. 6 in. 



7. Red structureless clay. 26 ft 32 ft. 6 in. 



6. Gray and red clay-shale with plant remains, Estheria, and Leaia 



tricarinata. 29 ft 61 ft. 6 in. 



5. Concealed. 26 feet 87 ft. 6 in. 



4. Sandy shale. 41 ft. 6 in 129 ft. 



3. Clayey limestone with marine fossils. Pine Creek horizon, i ft. 130 ft. 



2. Green clay. 8ft 138 ft. 



1. Sandy shale. 15 ft. 6 in '53 't- 6 in. 



Level of the railroad tracks. 



The Pine Creek limestone, resting on a bed of soft clay, may be seen 

 near the eastern end of the station-platform at Wood's Run. It is 

 there 23 feet 6 inches above the railroad track. Following the cliff 

 along for a few hundred feet the limestone has disappeared, and the 

 face of the bank is a solid mass of sandstone. Returning northwest 

 along the track and crossing Wood's Run, the limestone and clay are 

 found to be absent and the face of the cliff shows only cross-bedded 

 sandstone and shale for about half a mile. The Pine Creek limestone 

 and the clay then appear again, the limestone this time 65 feet above 

 the track. A short distance south of the foot-bridge over the tracks 

 and a quarter of a mile from Wood's Run, the base of the Buffalo 

 sandstone appears above the track with a dark sandy shale beneath it. 

 At the foot-bridge mentioned the section of the face of the cliff is as 

 follows : 



2. Heavy-bedded sandstone. 90 ft 90 ft. 



I. Thin-bedded sandy shale. 10 ft ;.... 100 ft. 



The lower photograph on Plate XIV was taken from this bridge. 



A short distance north of this foot-bridge there is another bridge 

 where the highway crosses the tracks, and 100 yards beyond this bridge 

 is the small ravine indicated on the diagram. The section at this 

 bridge is as follows : 



7. Sandstone and sandy shale. About 50 ft. 



