496 Dr. C. CaUaicay — The Meta7norphic and 



felspatbic or quartzo-felspathic seams. The chlorite variety is 

 sometimes so fine-grained as to resemble a slate, but, even under 

 the pocket-lens, it is seen to be a true foliated schist. 



According to hypothesis, these schists should graduate into the 

 " submetamorphic " rocks, but of this passage there is no satisfactory 

 proof. In the immediate Carnsore district there are no junction, 

 sections. The Survey Map, indeed, represents the two groups in 

 contact north-east of Ballytrerit House ; but, after a careful ex- 

 amination of the section, I could find no trace of the less altered 

 series. The rocks are here very clearly exposed in the shore for 

 about half a mile, the junction being placed on the Map in about 

 the middle of the section. The facts do not justify this separation. 

 The whole series is truly metamorphic, consisting of the types I 

 have described. The green slaty -looking bands, which are frequently 

 intercalated with gneissose beds, have apparently been mistaken for 

 the rocks of the " submetamorphic " group, from which they widely 

 differ in their degree of metamorphism. These green rocks are 

 thoroughly, though minutely, crystalline ; whereas the "submeta- 

 morphic" group is typically a felspathic slate in which metamorphism 

 does not advance beyond the incipient stage. 



Seven miles to the west-south-west, near Tom Haggard, we find 

 the two series in contact, but there are no signs of a passage, and 

 the junction has all the appearances of a fault. North of the junction, 

 we find nothing but pale-green slates, with here and there some 

 gritty bands. I traced the succession for about two miles across the 

 " submetamorphic " zone. Sometimes the rocks bore slight traces 

 of foliation, but the alteration occurred at irregular intervals, and 

 did not increase towards the junction with the metamorphic series. 

 The slates stopped abruptly on the north side of a slight depression, 

 and, immediately to the south of the hollow, we come to gneiss and 

 chlorite schist, with no trace of the slate series. 



Both types are well seen on the shore north of Greenore Point 

 with their ordinary lithological characters. Masses of gneiss and of 

 green slate lie side by side, but in no case could I find a passage 

 between the two. In one spot, near the Point, they occur on exactly 

 the same strike, the beds of the slate seeming to be a continuation 

 of the gneiss ; but there is no merging of the one into the other, and 

 the junction is clearly a fault. In another place, a mass of red 

 sandstone is let in between two areas of gneiss and slate lying on 

 the same sti'ike. 



I was so satisfied in the Carnsore district that the two formations 

 were brought together by faults, that I thought it unnecessary to 

 examine the section at Crossfarnoge Point, especially as Mr. Du 

 Noyer's Map quite bears out my views. At the north end of this 

 Map is an area of " submetamorphic rocks," bounded on the south 

 by a " gabbro dyke." South of the dyke, Mr. Du Noyer represents 

 "gneiss alternating with schist," "granitoid gneiss," and "gneiss, 

 with some schist bands," a description which agrees very well with 

 what I saw on the same strike near Ballytrent House. Mr. Kinahan, 

 indeed, represents the case somewhat differently. Mr. Du Noyer's 



