Pass of Llanberis, N. "Wales. 



Fhotograpii oy G. Bint^Uy, Hcaatngiiy. 



rito(o::rafh hy G. liiii^-l^y. UtaJini^ley. 



"IN MANY INSTANCES THE ICE . . . HAS CARVED OUT A U-SHAPED VALLEY IN THE 



LOWER PART OF AN OLDER RIVER VALLEY." 



Pass of Nant Ffrancon, N. Wales. 



GLACIER-FOKMED VALLEYS. 



