Proceedings, 



SUMMER SESSION 



HOLYWOOD. 



The first excursion of the season — half-day — took place on 

 15th May, to the section of the Raised Beach resting on Boulder 

 Clay which had been so well exposed by storms last Winter. 

 The Raised Beach here contains worked flints of a very early type, 

 like those of Ballyholme, Larne, and the Kinnegar. Many of 

 these were collected by members of the party, which numbered 

 over sixty. When all were assembled at the section the con- 

 ductor, Mr. R. J. Welch, called on Dr. Charlesworth to 

 give a short talk about the geology of that particular corner 

 of County Down, which he did, pointing out the special 

 interest it had for geologists owing to the fact that the 

 Carboniferous beds here underlie an unmistakable Permian 

 outcrop. This small area of Permian rocks is only exposed 

 at dead low water of spring tides just south of Cultra pier. 

 Dr. Charlesworth also called attention to the Raised Beach 

 with its flint implements, and especially to the fine section of 

 Boulder-Clay (now so well exposed by marine erosion) resting on 

 the Triassic beds, the junction being well seen at the north end. 

 This Boulder-Clay is a more than usually good example, large 

 erratics of basalt having fallen out of it on the beach. These may 

 have been derived from the basaltic plateau of Antrim, over 

 which the ice masses forming the Boulder-Clay travelled from the 

 northward. Other erratics were noted, including a good number 

 of Ailsa Craig eurite, one which looked like Tornamoney eurite 

 from North Antrim, and another which may be a Scotch granite. 



