Cork Rocks. 49 



Carboniferous Old Red Sandstone lies iinconformably on the 

 " Dingle beds," the representative of a portion of Jukes' " Glen- 

 gariff Grits ; " while south of Dingle Bay, between Doulus Head 

 and Killarney, there seems to be a somewhat similar unconforma- 

 bility. In the neighbourhood of the middle lake of Killarney, in 

 Glenflesk, and in the western portion of the Blackwater Valley, 

 there is the great fault with a downthrow to the northward, but 

 at the same time the Carboniferous rocks appear to be much 

 nearer to the "GlengarifF Grits" (Jukes) than they ought to be, 

 if a regular sequence intervened between them ; as, however, in 

 the places where the sections are best exposed, the rocks 

 evidently lie in inverted folds, nothing positive can be said as to 

 the original relations of one group to the other. Further south- 

 ward at Kenmare, and in the valley of the Lee, the relations 

 between the Carboniferous Limestone, and the red and bright 

 coloured older arenaceous and argillaceous rocks are very remark- 

 able. As pointed out in the Geological Survey Memoirs and 

 elsewhere, some miles westward of Kenmare in the neighbourhood 

 of Sneem and Kilmackilloge, respectively north and south of 

 Kenmare River, there are the " Carboniferous Slate," the upper 

 member of the sequence that extends downwards conformably 

 into the " Glengariff Grits " (Jukes) ; but in the neighbourhood 

 of Kenmare there is a conspicuous difference as red rocks, not to 

 be found to the westward, or in the country to the S.W., suddenly 

 make their appearance, and associated with them are the rocks 

 called Lower Limestone Shale, and the Lower Limestone ; these 

 red rocks appear to lie conformably on the " Glengariff Grits " 

 (Jukes), but it is questionable whether the Lower Limestone 

 Shale and the Limestone lie conformably on them or not. Further 

 eastward in the valley of the Lee, at Macroom, Coachford, 

 Innishcarra and other places, the Carboniferous Limestone seems 

 to lie nearly directly on the " Glengariff Grits " (Jukes). In these 

 different places " Lower Limestone Shale " is associated with the 

 Limestone, and in the maps it is generally represented as en- 

 circling the different masses of the latter, this, however, seems to 

 me to be improbable, as the Lower Limestone Shale is essentially 

 a littoral accumulation and consequently must have only accu- 

 mulated in those portions of the different areas where the con- 



SciEN. Peoc, R.D. S. Vol,. lu., Pt. II. E 



