740 MR. F.E. C. HEED ON THE LOWER PALEOZOIC [1^0 V. 1 899, 



on the west side they dip at 60° to 80° south-westward, with several 

 thin inter strati filed beds of rotten cleaved ash and flaggy layers 

 opposite Blind Cove. Beyond this point, as far west as IStradbally 

 Beg, grey slates with approximately the same angle and direction 

 of dip compose the cliffs, but immediately in the vicinity of the great 

 mass of felsite [120 w] [121 wj [122 w] forming the promontory 

 their dip changes to the north-east. On the western side of the 

 headland the old south-westerly dip, however, again sets in. 



On a small promontory about ^ mile east of Ballyvoyle Head, the 

 slates are seen to dip at angles varying from 45° to 6()° north-east- 

 ward ; and in the well-known section at the Head itself (illustrated 

 in the Survey Memoir, fig. 7, p. 60) they dip northward at 60°, and 

 have the Old Red Sandstone resting unconformably on their edges. 



No fossils have so far been found in these slates along the coast. 



III. General Stjccession and Subdivision of the Strata. 



Where the succession is most complete, as near Tramore, we find 

 at the base dark grey or black unfossiliferous slates which may be 

 conveniently called the Tramore Slates. Above these come a 

 series of impure limestones, which may be termed the Tramore 

 Limestone Series. These are dark grey at the base, and pass 

 down into the underlying slates, constituting Stage 1 of the series. 

 These beds are also well exposed on the west side of Dunabrattin 

 Head, as before mentioned. 



Separated from these lower beds by no strong lithological differ- 

 ence, but generally by a more arenaceous character and paler colour, 

 comes the main mass of the limestones. These constitute Stage 2, and 

 are well displayed along the west side of Tramore Bay and also at 

 Dunabrattin Head. The limestones faulted in among the igneous 

 rocks at Kilfarrasy and Knockraahon, and probably the altered 

 calcareous beds of Ballydouane Bay, belong to this stage. A typical 

 fossil of this horizon, not occurring in the overlying stage, is Phacops 

 Jamesii. 



The uppermost group of beds of the Tramore Limestone Series, 

 forming Stage 3, is more argillaceous -and fossiliferous ; it is 

 especially well developed in JNTewtown Cove, near Tramore, and 

 occurs also at Dunabrattin Head. One of the characteristic species 

 which are not found in the underlying beds is Trinudeus hibeniicus. 

 It is probable that the ' black shaly beds ' on the shore at Garrarus 

 Strand, containing a few fossils, belong to this horizon. I have 

 searched these beds at this locality without obtaining any recog- 

 nizable specimens, and unluckily those collected by the Surveyors 

 cannot be found (except one, namely, Lingula hrevis). 



Above Stage 3 of the Tramore Limestone Series in Tramore Bay 

 comes the variable series of graptolitic shales, thin interbedded grits, 

 tuffs, cherts, and felsites. At no other place along the coast have beds 

 with a similar fauna been found ; but it is possible that some of the 

 patches of black shales caught up and entangled among the later 

 intrusive rocks at Garrarus, Kilfarrasy, and elsewhere may belong to 

 this series. This group of beds, as developed in Tramore Bay, may 



