I902. Rkadk & Wright. — Marine Botddcr Clay in Co. Cork. 35 



At the bridge over the Hen, about two miles above or north 

 of Skibbereen, on the left bank are to be seen in the bed of the 

 river well-moutonned and rounded rocks, with unmistakeable 

 striae scored thereon, crossing the edges of the slaty strata and 

 bearing N.W. and S-K. Similar rocks were observed on the 

 shore with striae bearing in the same direction. The rounded 

 boss in the stream had a scooped-out hollow in it. These striae 

 seem to point to the Caha Mountains and the Macgillicuddy's 

 Reeks as the origin of the glaciers that produced them.'' 



Connected with these land-ice deposits some remarkably 

 fine micaceous banded silts are to be seen at the side of the 

 road near to O' Donovan's Lake, and also in small beds in the 

 mound or esker already described. The material of those silts 

 is as soft as flour to the touch. 



Perhaps the foregoing information is not much to generalise 

 from,. but, so far as we know, the facts conform to and help to 

 sustain similar observations in Great Britain. 



The Post-Glacial movements of the land in Ireland, as 

 exhibited in the raised beaches and the bays and fiords and 

 the submerged peat, are doubtless capable of correlation with 

 similar oscillations of the level of the land in Great Britain.^ 



The observations detailed in this paper and the abundant 

 yield of foraminifera from the Post-Glacial material examined, 

 strengthen the evidence adduced by Mr. Kinahan in his 

 " Geology of Ireland " of the existence of a continuous lo-feet 

 raised beach, which he has traced round the coast and loughs 

 of the South of Ireland. 



■" In the Memoirs of the Geological Survey of Ireland, Explanations of 

 Sheet 192 and part of Sheet 199 (Bantry and Dunmanus Bays), Beete 

 Jukes says :— " There is, however, no district in the British Islands, per- 

 haps, in which the proof of what is called glaciation is so universal and 

 well-marked." He also notices that glacial scratches often run N.W. and 

 S.E., though other directions are common, but more frequently approxi- 

 mating to N. and S. than to E. and W. 



^ In the Explanation of the Sheets of the Geological Survey of Ireland 

 including Clonakilty, Courtmacsherry, &c., p. 27, it is stated ''sub- 

 merged peat bog is found at dead low water of spring tides on the 

 western side of Courtmacsherry Bay, a.s on so many parts of the south 

 coast of Ireland," and that "these and other similar facts to be found 

 round all the coasts of Ireland seem to point to a recent depression of 

 the whole island." 



