284 Scientific Proceedings, Royal Dublin Society. 



head, which is composed of rather large angular fragments 

 embedded in a sandy matrix. 



On Weaver Point, beach-gravel lies on the platform among 

 blocks, at a height of 8 feet above the line of sea-growth. The 

 following section is seen here at the top of a small gully : — 



Feet. 



Boulder-clay, gravelly in places, . . 12 



Sand, with rubbly admixture, . . . . 2-3 



Beach-gravel and large blocks, . . . . 2-3 



Rock-platform. 



The beach-gravel is well rounded, and fills up the crevices 

 between large blocks, which lie in a hollow of the platform. 



From Ringabella to Weaver Point, the pre-glacial beach- 

 deposits consist for the most part, like those of the present day, 

 of shingle. 



Grab-all Bay. — In Grrab-all Bay the rock-platform, though 

 low-lying, is well marked, and remarkably smooth. It is overlain 

 for a considerable distance by 4 or 5 feet of a compact red and 

 black horizontally-bedded fine-grained sandstone (ferricrete). 

 This is capped by 35 feet of drift, much overgrown and obscured, 

 the top portion probably being boulder-clay. 



Camden Fort. — The platform is continued round Ram's Head 

 to the north of Camden Fort. About 150 yards west of the Pier 

 is 25 feet of head, resting on the rock about 8 feet above ordinary 

 high- water mark. The crevices in the rock are filled with shingle, 

 and the lower half of the head is gravelly, with large, angular 

 blocks of rock and well-rounded boulders. These well-rounded 

 stones are abundant up to about 17 feet above ordinary high-tide 

 as shown by sea-growth, and there are round blocks at least 6 feet 

 higher. It is not obvious that the head at this point is pre- 

 glacial, otherwise the occurrence of these boulders in it would be 

 of considerable interest. 



About 200 yards west of this is 10 feet more or less of pre- 

 glacial shingle, resting in a hollow of the rock a few feet above 

 high-water mark. There is a tendency also for modern storm- 

 beaches to accumulate along this coast. 



Curraghbinny, Bingashiddy, and Spike Island. — The pre-glacial 

 shore-platform can be traced round Curraghbinny, Ringaskiddy, 



