1H3-1914.J 7 3 



ancient Caledonian chain to the north-west, the relics of which 

 are now to be found in the peninsula of Cantyre and the islands 

 of Islay and Jura. 



The relationship of the Carboniferous rocks to the Old Red 

 Sandstone cannot be [studied in the coast region ; as where the 

 Carboniferous is seen at Ballycastle, the " Old Red " is absent. 

 The former series resting directly though, of course, unconform- 

 ably on the Dalradian gneiss and schist. The Carboniferous of 

 Ballycastle belongs entirely to the Lower or Calciferous Sandstone 

 Series and, as in Scotland, contains workable coals. These have 

 at various times been wrought, and of peculiar interest are certain 

 pre-historic workings which were discovered on the cliff face to 

 the east of Ballycastle. 



The next series to be found is the Triassic. At Cushendall 

 its red sandstones and conglomerates rest on the Old Red group, 

 but towards the north transgress its boundaries and rest directly 

 on the Dalradian. Of great interest are the coarse conglomerates 

 of Cushendall, which contain much material, including boulders 

 of conglomerate from the underlying Old Red Sandstone series. 



The Triassic rocks also crop out on the lower slopes of 

 Benevenagh, in Derry. 



In parts, notably at Whitepark Bay, the red sandstones of 

 the Trias are followed by the Rhaetic shales and these in their 

 turn by the Lower Lias, in which numerous fossils have been 

 found. This is the sole representative of the Jurassic in Ireland. 



Resting now on Lias or Rhaetic, now on Trias or Old Red, 

 or again, as at Tievebulliagh, near Cushendall, on the Dalradian, 

 a conspicuous band of Cretaceous rocks extends round almost the 

 entire coast of Antrim, though at times obscured by faulting and 

 land-slips, and in places removed by denudation. 



It includes representatives of both Greensand and Chalk j 

 the latter, which is worked on a considerable scale, being known 

 locally as the "White Limestone." 



