MR DAVID MILNE HOME ON THE BOULDER-CLAY OF EUROPE. 



665 



Arran. — Dr Bryce* has pointed out that the rocks on the N.W. sides of many 

 of the hills have been denuded and smoothed, whilst on all other sides they are 

 rough. 



Kirkcudbright. — Mr Hay Cunningham states that "large rounded frag- 

 ments of granites and syenites are abundantly scattered over the county, and so 

 arranged as to indicate that they have been dispersed by a force proceeding from 

 the N.W."f 



In Northumberland, the following table compiled from the reports of Mr 

 Tait of Alnwick, Secretary to the Berwickshire Naturalists' Club, \ shows the 

 quarter from which the transporting agent moved, judging by the striations and 

 groovings : — 



Locality. 



Nature of Surface. 



True Bearings. 



Ratcheugh. 



Limestone Rock below Boulder-clay. 



N. 



Do. 



Blocks in Boulder-clay. 





N.W. 



Belsay. 



Limestone Rock. 





N.N.W. 



Sea-shore, Dun- \ 

 stanborough. J 



Limestone Rock below Boulder-clay. 



W.N.W. 



Swinhoe. 





do. 



N. 50° E. 



Belford. 



• • • • • • 



do. 



N.W. by W. 



Sea-shore, Birling. 



Sandstone Rock under 



do. 



N.E. 



St Abb's Head. 



Porphyry under 



do. 



N.W. and W.N.W. 



Fame Islands. 



Basalt under 



do. 



N.N.W. 



Alnwick. 



Limestone under 



do. 



N.N.W. 



The plains of Yorkshire are strewed over with blocks transported from Cum- 

 berland, one of which is the well-known boulder of shap-granite, now standing 

 in one of the streets of the town of Darlington. 



Near Liverpool, the direction of the striations on the rocks is between 

 N. 15° W. and N. 42° W. 



In Cheshire, the direction is N. 30° W.§ 



In Wales and Somersetshire, chalk flints occur in the drift, which must have 

 come from the county of Antrim, Ireland — i.e., from N.W. 



In Norfolk there are two boulder-clays, separated by a bed of sand containing 

 sea-shells. The upper boulder-clay, as the late Mr Trimmer showed, || contains 

 fragments of oolite rocks, which must have come from the westward, passing- 

 over a ridge of chalk rocks, which, however, do not indicate any abrasion. Mr 

 Trimmer, taking into view the levels of the country, held it impossible to ascribe 



* Geology of Clydesdale, p. 271. 



f Highland Society's Transactions for 1843. 



£ Transactions of Berwickshire Naturalists' Club, vol. v. pp. 238, 372. 



§ Lond. Geol. Journ. for 1862, vol. xviii. p. 377. 



|| Lond. Geol. Journ. for 1858, vol. xiv. 



