140 MR. E. HULL ON THE VESTIGES OF EXTINCT 



moraines assume the form of a collection of large boulder- 

 strewn cumuli, or mounds, unlike anything I have ever 

 observed beyond the limits of a glacier district.* There 

 is, however, one remarkable exception to which I shall 

 presently refer. 



The rocks of a large district surrounding the interior 

 mountains are remarkably ice-mo'ilded, polished and stri- 

 ated, as far as the head of Morecambe Bay to the south, 

 and the vale of the Eden to the north. 



The Drift, a marine boulder-clay, rises to the height of 

 1200 feet oil the southern slopes of the hills. Of its ele- 

 vation on the northern flanks I cannot speak from per- 

 sonal observation. The clayey gravels, frequently bright 

 red from the decomposition of the felspathic rocks, which 

 occur at higher elevations, appear to consist of moraine 

 matter. 



Many of the small lonely mountain lakes, or tarns, have 

 been formed partly by moraines thrown across their out- 

 lets. Amongst the most interesting examples of this kind 

 are Easedale Tarn, Stickle Tarn and Blea Tarn. The for- 

 mation of some others, such as the tarn that lies between 

 rielvellyn and Fairfield, seems to be referable to "the 

 scooping theory previously explained.^^ 



I have already stated that several well-marked moraines 

 may be observed at elevations considerably below the 

 upper limit of the Drift. All those occupying this position 

 must, in consequence, be of more recent date than this 

 marine deposit. Of examples of this class, the most re- 

 markable which has yet come under my notice is the 

 large terminal moraine at the lower extremity of Grisedale. 

 This gorge, one of the most desolate and savage in Cum- 



* See plates i, 2, JSdinhurgJi Neiv Philosophical Journal, vol. xi. p. 31. 

 This form of moraine appears to recur frequently in Scotland, according to 

 the accounts of Sir C Lyell and Dr. Buckland in the Proceedings of the 

 Geological Society, vol. iii. p. 335, and pp. 340 et seq. 



