O'Reilly— 0/« the Wade of the Comt of Ireland, 8fc. 159 



"East of the promontory of ArcUaheen, the rock still maintains 

 its coarsely crystalline character. A set of very distinct, nearly 

 vertical cross-joints, running south-west occurs here, traversing the 

 reddish and grey gneissose granite. The direction of these points 

 nearly coincides with that of the promontories and inlets in this 

 locality." 



(p. 104.) — " Along the south-east face of Meggart Headland a 

 basalt dyke about 2 feet thick occurs, and thins out before reaching 

 the top of the cliff. A large basalt dyke, 10 or 12 feet wide, occurs to 

 the north of this, and is continued into the north-west face of Morard 

 Head, where it is weathered out and forms a cave. 



'At Pollabraher ('Wolf's hole'?) the sea has cut through the 

 small headland, foiTaing a natural arch, and inland occurs the cave 

 Lagrehy (or Ram's cave), which is a round or oval shaped pit, like a 

 quarry hole, and has been formed along vertical joints running east 

 north-east. It communicates with the sea by an underground passage, 

 and is cut out of the granite, which has slipped in and been carried 

 away as shingle. Torbanny, which is a small sea-stack, rises to the 

 eastward. 



" Along the western side of the island, a very well-marked shingle 

 bank forms the margin. It consists of rounded blocks of quartz, a 

 few of hornblendic and augitic rocks, and the rest of gray granite. 



" To seaward of this bank a fringe of rocks but little elevated above 

 the sea level, consists uniformly of grey and reddish granite." 



(p. 105.) — "The quartzite in Port Doon dips generally to the 

 eastward at angles of 20° to 30°. It is intersected by numerous 

 vertical joints, running south 30° east, along which the island rock, 

 Torahaur, which stands as a sentinel at the entrance of this little 

 natural harbour, has been cut off from the mainland." 



(p. 106.) — "Northward, from Port Doon, the ground rapidly rises, 

 and the rock in the cliffs consists of white tabular and flaggy quartzite, 

 dipping east 10° north at 20°. The coast-line is most irregular and 

 deeply carved into bays, together with headlands and numerous sea- 

 stacks. These cliffs end in a remarkable narrow ridge of rocks named 

 the ' Anvil,' which terminates at its northern extremity in Tormore. 

 A channel has been cut through by the sea at the southern end, where 

 this ridge is connected with the mainland by a natui'al arch. 



" Along the western shores of the Doon the rocks preserve the same 

 general easterly dip, and exhibit various sea-stacks or tors ; a rather 

 picturesque one being Tornaweelan, which stands at the entrance to 

 Portachalla Bay. In the southern cliffs of this bay and on the shore 



R.I. A. PKOC., VOL. XXIV.., SEC. B.] 



