Plate 10 



The Whirlpool rapids and American bank, looking north. The talus above the gorge road covers the 

 upper Medina sandstones and shales. The lowest projecting ledge consists of the two Clinton lime- 

 Stones; the talus above that covers the Rochester shales, and the upper cliff is of Lockport limestone. 

 The upper gray Medina projects in one place, 'and shows the Clinton shale above it. 



