O'Reilly — On the Waste of the Coaat of Irchoid, ^c. I'JO 



except a small part along its northern border, which belongs to 

 the County Dublin. Along the seabeach, between Bray and Gr(;y- 

 stones, there are low cliffs of marl, with limestone and other pebbles 

 and fragments of shells, over which is a deposit of sand and gravel." 



(It is in these cliffs that the action of the sea, abeady refeiTcd 

 to, has been so marked, undercutting them and causing the cliff face 

 to fall away, and be subsequently removed by the tidal action. As 

 already mentioned, the waste has been so considerable that the railway 

 line as originally laid down, at a slight distance from the face of the 

 cliff, has been so endangered by the approach of the cliff face, that 

 the line had to be withdrawn inland at some considerable expense, 

 while costly works of underpinning and strengthening the base by 

 stockades and groyns has been going on up to quite lately. The same 

 remarks hold good as regards the stretch between Bray river and 

 Bally brack). 



Memoir of Geological Survey of Ireland, sheets 91 and 92 (1891). 

 The area included in the sheets embraces portions of the Counties of 

 Meath, Louth, and a small tract of the County Dublin (no available 

 particulars given). 



Memoir of Geological Survey of Ireland, Sheets 81 and 82 (1871). 

 These maps embrace the greater part of the County Louth, showing 

 foiu'teen or fifteen miles of its coast-line (no particulars given). 



Memoir of Geological Survey of Ireland, sheets 60, 61, and part of 

 71 (1881). The District described in the Memoir lies wholly in the 

 County Down. 



(p. 20.) — " Raised beaches. — There are numerous indications around 

 the coast that the land has been raised in recent times. These indica- 

 tions occur in the form of terraces, consisting of stratified sands and 

 gravels, often containing marine shells of the species now inhabiting 

 the neighbouring seas, with possibly a few forms which may have 

 disappeared. These terraces were clearly old sea-beds, and they have 

 since been raised into land- sru'f aces beyond the reach of the highest 

 tides. Such terraces are found skirting the northern shores of Dundi-um 

 Bay, partially covered and concealed by sand-hills, and extending to 

 the foot of the high ground at Newcastle. They again appear, form- 

 ing a very naiTOw strip along the coast at Annalong, where they have 

 been subjected to the wasting effects of the waves ; but on both sides 

 of the entrance to Carlingford Lough, at Soldiers Point and Greenore 



