172 Mr. R. Griffith on Mr. Weaver's Paper relative 



side of the Blackwater near Lismore, &c, forming in the 

 centre of the ridge an anticlinal axis." He further observes, 

 " The anticlinal axis I have not seen, the dip which I observed 

 being throughout to the south" &c. 



Now I must assert that the anticlinal axis does exist, and is 

 clearly visible in the section of the strata of this ridge, which 

 is exposed to view on the west bank of the river Blackwater, 

 which in this locality takes a southern course, and cuts through 

 the ridge between Killahally, opposite to Dromana Castle on 

 the north, and Camphire on the south, as may be clearly 

 seen by reference to my large geological map. The anti- 

 clinal axis is visible nearly in the centre between Camphire 

 and Killahally, the strata at the axis and on either side con- 

 sisting of alternations of red quartzose rock and red clayslate, 

 which are succeeded both on the north and south by alterna- 

 tions of gray quartz-rock and red slate, those to the north 

 dipping north at angles varying from 60° to 85°, and those 

 to the south dipping at angles varying from 35° to 40°. 

 These strata are succeeded on the south side by yellow sand- 

 stone containing calamites, and lastly, by alternations of lime- 

 stone and black clayslate. On the north side the yellow 

 sandstone is not visible, owing to a covering of diluvial matter, 

 but the limestone alternating with black clayslate is visible 

 immediately to the north of Killahally, dipping to the north 

 at an angle of 60°; consequently, there can be no doubt of the 

 identity of the limestone of the valley of the river Blackwater 

 at Lismore, and thence to Dungarvan, with that of the Bride 

 at Tallow, Camphire, &c. 



It is to be observed, that the limestone of the valley of the 

 Blackwater immediately to the south of Lismore, as repre- 

 sented in my section, published in the Journal of the Geolo- 

 gical Society of Dublin, dips to the south at a very high angle ; 

 but fortunately this is not universally the case, as at Killahally, 

 three miles south-east of Lismore, the strata, as above-stated, 

 dip to the north, which in regard to the trough-shape of the 

 limestone, proves by observation what I had previously sup- 

 posed to be the case by induction. 



In like manner I am prepared to follow my section in de- 

 tail from the valley of the Bride to the south coast at Cork 

 Head, and to show that at each point the strata do actually 

 dip in the direction exhibited on the section ; but I must 

 remark in reference to the section published in the Journal of 

 the Geological Society of Dublin, that in one point, namely, 

 on the west side of Cork harbour, the lithographer has re- 

 presented the beds of the carboniferous limestone as abutting 

 against the subjacent carboniferous slate, while in the original 

 drawing, as in nature, they are conformable. 



