PLATE X.— View of the " coirv " in Section 7, showing au example of gorge 

 cutting in an earlv stage. The backward cutting of the falls produces the gorge, 

 and tiie downward cutting of the stream the V-shaped trench seen above. The 

 Encrinal limestone is seen near the middle of the cliff. 



— Photographed by A. W. GK.\HAr. 



