274 Scientific Proceedings, Royal Dublin Society. 



Grower, in South Wales, the boulder-clay overlies the raised beach 

 and head. As far back as 1887, Mr. Lamplugh described a pre- 

 glacial beach, little raised above the modern beach, and overlaid 

 by blown sand, a land- wash, and boulder-clay, near Bridlington, 

 Yorkshire. 1 



It would appear, therefore, that a considerable portion of the 

 coast-line of Southern Britain is of pre-glacial age. The approxi- 

 mation over so wide an area of the sea-level in pre-glacial times 

 to that of the present day renders it very probable that Ireland 

 was already insulated before the Glacial Period. 



PART II. 



Detailed Description of Coast Sections visited between 

 Baltimore and Carnsore Point. 



Baltimore. — The glaciation in the neighbourhood of Baltimore 

 is more severe than in the districts to the east, and neither lower 

 head nor beach-deposits were found ; but from a point on the 

 shore near the church to the small bay at the southern end of the 

 village, boulder-clay rests in several places on a striated platform 

 of rock, and is banked against a rock-cliff behind. The platform 

 is 3 or 4 feet above high-water mark, and presents the same 

 features as the platform beneath the boulder-clay at Ringabella 

 Bay. There is little doubt that it is the pre-glacial platform 

 of marine erosion, from which all beach-gravel and lower head 

 were removed during the glaciation of the district. 



Lough BZyne. — At the south side of the small bay opposite 

 Bullock Island, on the western side of the entrance to Lough 

 Hyne, a narrow but distinct platform was found at about 6 feet 

 above high-water mark. The boulder-clay overlies it, and is 

 plastered against an old cliff at the back of the platform. Between 



1 "Report on the Buried Cliff at Sewerby," Proe. Yorks. Geol. and Polytee. Soc, 

 vol. ix. (1889), pp. 382-392 ; and Eep. Brit. Assoc, for 1888. See also " Drifts of 

 Flamborough Head," Quart. Jour. Geol. Soc., vol. xlvii., p. 394; and Proc. Yorks. 

 Geol. and Polytee. Soc, vol. xv. (1903), pp. 91-95. 



