Tarns on the Ilaydacks Mountain, Buftermere. 



407 



This iippei' surface is well glaciated, and the roches moutonnees are 

 exceptionally good. The ice has undoubtedly moved from the 

 south-east, down the slopes of Brandreth and Grey Knotts, which 

 form a continuation of the Haystacks ridge in this direction, and 

 reach a considerably higher elevation. 



Two of the tarns on this mountain are of considerable size, and 

 there are also one or two much smaller pools which show some 

 interesting: features. 



..^' ' '■■ ^'^w: 





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<^?. 



Pool, 







M: 



\. 



S 

 '^^_"-. 



C } /■ \Pe(xl 



BLackbec/C 

 Tarrv 



i 



'■IX 



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Fig. 1. — Contour Map of Haystacks Mountain, showing position of tarns and 

 peat-bog. Scale 6 iuclies to 1 mile. 



(1) Blackbeck Tarn. — This tarn is the only one which is dignified 

 with a distinctive name on the six-inch Ordnance Map. It is a sheet 

 of water some 250 yards long by 100 yards wide, and is situated 

 towards the south-eastern end of the Haystacks, very near to the 

 edge of the crags, and it drains over the lowest point of the crags 

 into Warnscale. 



Fig. 2. — Roche moutonnee, Blackbeck Tarn. 



On all sides except towards the outlet the tarn is surrounded by 

 Bori'owdale rocks, which show very fine examples of roches 

 moutonnees, and one large rock on the west side near the outlet is 

 particularly fine ; on the south-east side it is planed away to 

 a smooth surface, which makes an angle of about 15° with the 

 natural planes of separation, as shown in Fig. 2. 



