Kin AH AN AND Baily — EepoH on Hocks, 8fc. 497 



nesses of the rocks of the '' grey and green" type. Some of the lime- 

 stones are probably fossiliferous. In the country N. W. of Six-mile- 

 Cross the Silurians appear to lie directly on the metamorphosed 

 Cambrians. 



Lishellaio. — Here rocks of the ''Red arenaceous" type lie uncon- 

 formably on Cambro- Silurians, while they are overlain unconformably 

 by Carboniferous rocks. 



Brumshamho. — The Silurian rocks near this place are of both the 

 " Red arenaceous" and the " grey and green " types. They probably 

 lie, as at Lisbellaw, on Cambro-Silurian, but their base is not exposed. 

 They are overlain unconformably by Carboniferous rocks. 



Curlew Moimtams. — The rocks here appear to be some of the 

 latest Silurians in IST. E. Connaught, and to be on a higher geological 

 horizon than the rocks of Drumshambo ; also than those to the 

 westward, IS". W. of Ballaghaderreen. They are principally of the 

 " Eed arenaceous" type, although to the N. W. of Lough Key the top 

 of the "grey and green" rocks is seen. They are overlain uncon- 

 formably by the Carboniferous rocks. 



Ballaghaderreen. — To the westward, and north-westward of Bal- 

 laghaderreen, rocks of the " Red arenaceous" type lie unconformably 

 on metamorphosed rocks, which may be of either Cambrian or Cambro- 

 Silurian age. In the rocks of the "Red arenaceous" type is a mass 

 of grey and green rocks, containing fossils of Silurian and Caradoc- 

 Bala types. The rocks of the " grey and green" type evidently con- 

 stitute only an inlier in the others, similar to those near Six-mile- 

 Cross ; except that in the last, fossils have not as yet been found. 

 The Silurians are overlain unconformably by Carboniferous rocks. 



Croaghlfoyle. — Here the rocks all belong to the "Red arenaceous" 

 type ; being principally conglomerates, although in one place at 

 least there is below them a considerable thickness of sandstone and 

 sandy shales. They lie unconformably on metamorphosed Cambrians 

 or Cambro-Silurians, while they are overlain unconformably by Carbo- 

 niferous rocks. 



Mulrany. — Here are conglomerates, sandstones, and shales be- 

 longing to the "Red arenaceous" type, lying unconformably on 

 metamorphosed Cambro-Silurians, and overlain unconformably by 

 Carboniferous rocks. 



Clare Island. — Although the rocks here belong to the " Red 

 arenaceous " series, there is in them a considerable thickness of red 

 slates or shales. They lie unconformably on metamorphosed Cambro- 

 Silurians. 



Louislurgh. — Here, as in Clare Island, red slates and shales appear 

 in the rocks of the " Red arenaceous" type, especially in the northern 

 portion of the area, where they are of considerable thickness ; while 

 in the southern part they are interstratified with sandstone and con- 

 glomeritic rocks. The rocks of part of this area lie unconformably on 

 metamorphosed Cambro-Silurians, while the rest are brought down by 

 a fault against metamorphosed Silurians. 



