Vol. 51.] AND GRAVELS OF ABERDEENSHIRE. 479' 



Mr. G. H. Morton referred to the Glacial drift-deposits of the 

 country bordering the Mersey and Dee, and he considered that they 

 were deposited in the sea between the coast of Wales and the North 

 of Lancashire where glacial conditions prevailed. Beds of inter- 

 stratified sand, often ripple-marked, and sometimes containing rolled 

 baUs of clay, divided tbe Boulder Clay into beds, and frequently gave 

 it a stratified appearance. Tbe shells found in the Boulder Clay had 

 been described as very fragmentary, but the numerous species in his 

 own collection were remarkably perfect. They were all species now 

 living in the Irish Sea, the most abundant being those common on 

 the sea-shore at the present time. All the observations that he had 

 made tended to show that the Boulder Clay and associated sands 

 were deposited in a sea with floating ice, and were not the result of 

 glacier-ice moving over that part of the country. 



Mr. Marr also spoke. 



Q. J. G. S. No. 203. 2 l 



