SOUTHERN PART OF THE LAKE -DISTRICT. 157 



Fig. 4. — Contour-map showing the form of the land at 2500 feet. 



II. Moraines. 



The moraines belong almost exclusively to the late set of glaciers. 

 They occur at the heads of Mosedale, Wastdale, Langdale, and in 

 the Easdale and Greenburn valleys*; also about Angle, Stickle, 

 and Easdale Tarns. Those in connexion wth the tarns will be again 

 alluded to in the sequel. 



III. Lake-basins. 



In my first paper on the subject of lake-basinsf, I discussed the 

 origin of the following Cumberland lakes: — Derwentwater, Bas- 

 senthwaite, Buttermere, Crummock, and Loweswater. The facts of 

 the case — the lakes being but long shallow troughs, the thickness 

 of glacier ice which moved along the valleys in which the lake3 

 now lie, the agreement of the deepest parts with those points at which, 

 from the confluence of several ice-streams or the narrowing of the 

 valley, the onward pressure of the ice must have been greatest — 

 seemed to warrant the conclusion " that the immediate cause of 

 these lake-basins was the onward movement of the old glaciers, 

 ploughing up their beds to this slight depth, in the way Professor 

 Ramsay's theory suggests." 



I now propose to consider, in a similar manner, the origin of 

 Wastwater, Grasmere, "Windermere, and Coniston Water, and Easdale, 

 Codale, and other tarns. 



* Those in the Longstrath and the other valleys to the north of the watershed, 

 and on Stake Pass, have been noticed in a previous paper (Quart. Journ. 

 Geol. Soc. vol. xxix. p. 422). 



t Quart. Journ. Geol. Soc. vol. xxx. p. 96. 



