1907. Hinch. — Cork Conference. — Geology. 265 



among those sections visited. At Clonakilty and the Old 

 Head the rock platform was seen as a distinct feature on the 

 shore line ; at Church Bay the whole succession occurred in 

 one section, and at Youghal the marly Boulder-clay of the 

 " Irish Sea glacier " was seen covering the ''head " and over- 

 lain by the Boulder-clay of the " inland ice." A steady 

 search for shells or shell fragments in the raised beach 

 gravels was made at all the localities visited, but produced no 

 result. 



The Glacial deposits are strictly local, the Boulder-clay 

 (with the exception of the marly Boulder-clay of the "Irish 

 Sea " ice) being derived from the Old Red and Carboniferous 

 rocks. The stratified sands and gravels attains considerable 

 depths in the valleys, and has aided in places in influencing 

 post-Glacial drainage. 



Submerged Cromleac at Rosteixan. 



In post-Glacial times submergence again took place to 

 nearly pre-Glacial level, and in connection with this submer- 

 gence an interesting piece of evidence came under the notice 

 of some of the members of the Conference. On the excursion 

 to Aghada the conductor of the Conference led a small party 

 to Saleen Creek to investigate an alleged submerged cromleac 

 reported by the Geological Survey in that place. The crom- 

 leac, which stands in the slob about 30 feet from the southern 

 shore of the estuary, was photographed by R. Welch, M.R.I.A. 

 (see plates) and it was decided that further evidence should 

 be collected in order to estimate its value as an indication of 

 recent geological submergence. 



The cromleac is formed of three upright limestone slabs, 

 with a fourth as capping stone. The uprights are in height 

 as follows : — North side stone, 5 feet 4 inches, South side 

 stone, 4 feet 6 inches, West side stone, 5 feet 8 inches, and for 

 between two and three feet the uprights are covered with a 

 growth of seaweed. For the archaeology of the cromleac the 

 reader should refer to Mr. Welch's paper in the present num- 

 ber, where he will find the matter dealt with in considerable 

 detail. 



