SOUTH-WEST JKELAND. 183 



clad, while the valleys had their systems of glaciers, 1 

 a large glacier occupying the valley of the Flesk, 

 while the moraine-drift left by others occurs in various 

 places. The drift due to the Flesk valley glacier 

 forms a flat-topped bank, as viewed from the Lake 

 Hotel, Killarney ; and "this thick mass of drift con- 

 ceals all the rocks along the base of Mangerton, Cro 

 hane, the Paps, and the Caherbarnagh Mountains, a 

 distance of fully thirty miles." Here, as well as in the 

 other valleys where glacial-drift has accumulated, rain 

 and rivers have done very little work in re-excavat- 

 ing the valleys ; while in all the valleys opening west- 

 ward marine action is apparent, all the glacial-drift 

 below the 350 feet contour-line being more or less 

 denuded and washed into gravel and shingle, the 

 deposit of round shingle in the country north of 

 Mangerton and Crohane being quite remarkable. In 

 the valleys opening southward and eastward the result 

 of the marine action is not so striking ; still we may 

 suppose that such action took place there, as sands, 

 gravels, and shingle are found at the lower levels, and 

 moraine-drift at the higher. 2 



" Memoirs of the Geological Survey," Ex. sheet 173, p. 7. 

 2 In a valley opening south in the neighbourhood of Hungry Hill, on 

 the north of Bantry Bay, there is unmistakable evidence of a glacier 

 having come down within 140 feet of the present sea-level since the 

 " Esker-sea " period. This, however, seems to be an exceptional case, 

 and may have been similar to one of the glaciers only just discovered 

 by Mr John Muir in some of the Californian mountain gorges this 



