The North of Ireland during the Glacial Period. 3 



The conclusions at which the lecturer had arrived as the 

 result of his work in the North of Ireland were as follow : — 



(a) The district was first glaciated hy ice which came down 

 the Firth of Clyde from the Scottish Highlands, over-rode the 

 whole of the Counties of Antrim and Down, extended at least as 

 far inland as the south-west corner of Lough Neagh, and passed 

 over the Mourne and Carlingford Mountains and so into the 

 Irish Sea. 



(6) At a slightly later stage ice from the mountainous 

 regions to the west and north of Lough Neagh advanced into 

 the lowlands bringing with it boulders of the granites and 

 pyroxenic rocks of the Slieve G-allion area, and gradually pushing 

 back the Scottish ice. 



The western ice-sheet passed south eastward across the 

 head of the Belfast valley by way of Moira and Hillsborough, 

 and so out to sea at Newcastle. It formed a continuous sheet 

 away to the south-west as far as the central plain of Ireland. 



A portion of the western ice also flowed into Lough Neagh 

 and thence northwards by way of the valley of the Lower Bann 

 as far as Coleraine, but it did not reach the eastern shore of 

 Lough Neagh except in the extreme South, being held u]) by the 

 Scottish ice, which though in retreat still occupied that part of 

 the area in sufficient force to hold up the flow from the West. 



It would thus appear that the Scottish and AVestern ice- 

 sheets were to some extent contemporaneous, and that no 

 lengthy period elapsed between the two glaciations, as has been 

 held by some geologists. 



The lecture was illustrated by lantern-slides, maps and 

 relief models of the Belfast District, and the lecturer answered 

 several interesting questions put by members of the audience. 

 The meeting terminated with a hearty vote of thanks to the 

 lecturer. 



