ON THE ERRATIC BLOCKS OF ENGLAND, WALES, AND IRELAND. 519 



Comparison of the Boulders of the Dee vrith those of the Mersey — continued. 



Mersey Dee 



per cent. per cent. 



Quartzite ... O'OO 0-25 



Felsite 1]3 051 



Limestone 0-84 0-00 



Local sandstone 084 0-51 



Various of doubtful origin 3-38 051 



100-00 100-(W 



Summary. 



Mersey Dee 



per cent. per cent. 



Lake District rocks 56-34 46-61 



Scotch rocks 27-33 11-39 



Diabase 1-13 24-32 



Silurian grit 5- 07 663 



Alia 10-13 1105 



10000 10000 



The diabase, which is so plentiful in this district, is very scarce 

 amongst the Mersey boulders, and, according to Mr. D. Mackintosh, who 

 speaks of them as Scottish greenstones, they are not common in the neigh- 

 bourhood of Chester (' Q. J. G. S.,' vol. xxxv. 1879, pp. 434-438). 



Speaking of Delamere Forest, the same author says : ' Scottish green- 

 stone (with a few exceptions) is absent.' 



We have not had an opportunity of comparing the rock with speci- 

 mens from Scotland, so have not included them amongst the Scotch 

 rocks in the analysis. Considering them as Scotch, the proportions 

 would stand as follows : Lake District, 46"61 per cent. ; Scotch, 35-71 

 per cent. ; alia, 17" 68 per cent. 



This would show a considerable excess of Scotch rocks on the Dee 

 shore as compared with that of the Mersey. 



Barnston and Penshy. 

 Reported hy W. Mawbt, Esq., per Glacialists' Association. 



6 L.D. andesites, 1 Yewdale breccia, 1 Silurian grit, 2 diabase, 2 

 sandstones (local), 1 Scottish granite, 1 Eskdale granite. 



Derbyshire. 



Note on Boulder Clay and other Glaoial Deposits between Chapel- en-le-Frith 



and Miller'' s Dale. 



Reported hy A. Taylor, per Glacialists' Association. 



In Chapel-en-le-Frith boulders, andesites, granites (and a breccia), 

 &c., are fairly numerous. 



Near the east end of the village a bed of boulder clay containing 

 granites, &c., and vein quartz pebbles, is being worked for brick-making. 

 Height about 700 ft. 



A boulder with three faces scratched, all from narrow to blunt end, 

 was found on the tramway. 



One of granite, 40 in. x 24 in. x 24 in., was found in the brook at Bar- 

 moor Clough (800 ft.). 



In the face of the cliff overlooking Barmoor Clough, on the right 



