3gQ REPORT — 1856, 



pendicular on five line8, a, b, c,d,e; on each side of these lines 



clined, at points farther removed less so^ Fig. 1 5. 



the least (recorded) inclination being 65 3^,,^,. ^ vV ^ 



to the N.N.W. (south of rroutbeck), and A/-// 



75° to the S.S.E. (north part of Helvel- 



Ivn) Thus the extreme difference ot 



dip in the cleavage of the slates of this 



tract is 40°; the most prevalent dip of 



cleavage is to the N.N.W., about 80 . 



The lines whose cleavage is vertical are 

 niostly coincident with faults, or remark- 

 able folds of the strata. The dip of the 

 strata is most regular and continuous be- 

 tween Grasmere and Troutbeck,-on an 

 average about 33° to the S.S.E.: in the 

 same tract the dip of the cleavage on an 

 average is 80° to the N.N.W. The angles 

 included between the planes of cleavage 

 and those of stratification = on an average 



67° 



I'have examined this tract of country 

 many times, and have recorded carefully 

 the strikes and dips of bedding and clea- 

 vage in a great number of cases. Ihe 

 facts of my survey agree in several fea- 

 tures with Mr. Sharpe's data, but they 

 conduct to somewhat different inferences. 

 There are not so much lines or axes as 

 several parallel bands in which the clea- 

 vage is vertical or deviates 5° to 10 on 

 either side, and these bands are rather 

 suddenly succeeded by others in which 

 the cleavage dips with considerable stea- 

 diness about 70°. Thus a band of verti- 

 cal and highly inclined cleavage passes 

 through Helvellyn; a band of c eavage 

 inclined 50° to 70° northwardly runs 

 through Grasmere and Rydal; a band ot 

 vertical and highly inclined cleavage 

 passes through the tract between Am- 

 bleside and Low Wood Tnn, and indeed 

 extends as far south as a little north of 

 Bowness ; then succeeds another band of 

 cleavage inclined 72° to N.N.W. ; and 

 this is followed by nearly vertical bands 

 in the lower part of Windermere. North 

 of the Helvellyn band comes in the band 

 of Borrowdale, inclined southwardly U , 



52° 40°. 



By combining these observations as in 

 Diagram No. 15, the succession of these 

 bands appears distinctly ; and it is evi- 

 dent that the cleavage dips run mto 

 systems of greater and less inclination, 



highly in- 



Watendlath. _-- 



Borrowdale. 



