BROOKLYN CHANNEL 



207 



the topography. The Belt Line makes a deep cut from west to east 

 squarely across this promontory, with the track level at about 800 feet 

 altitude. The section sho^\^l in the cut is sketched in figure 2. Midway 

 is a filled channel of Berea sandstone, whose deeper central portion is 



Figure 1. — Portion of Clerelaml Quadrangle, showing Location of Brooklyn Channel 



below the level of the road-bed, hence unexposed. The walls of the chan- 

 nel are of red Bedford shale. The east wall is steep, the inclination 

 being about 35 degrees, with the Bedford shale rising rapidly above the 

 base of the cut until it attains a height of 30 feet above the level of the 



O FEET 



FiciUKE 2. — Section of the Belt Line Railroad Cut 

 This cut Is across the Brooklyn Channel of Berea sandstone cut hi Bedford shale 



road-bed. The west wall has a much more gentle inclination, only about 

 10 degrees; the Bedford rises much less rapidly from beneath and attains 

 a height of only 10 feet above the track at the west end of the cut. The 

 two reproduced photographs which form plate 8 show tliese two contacts, 



