Devon and Cornwall, Belgmm, the Eifel, ^c. 475 



the (supposed) fault in the Gap of Dunloe, but not so 

 coarse-grained*. 



The conglomerate on the top of the Reeks is perfectly 

 conformable with the underlying strata, and, in fact, a regular 

 gradation may be traced from the lower or chloritic portion 

 of the series through the reddish-grey into the brick-red 

 quartz-rock and conglomerate. 



Proceeding now to the Dingle peninsula, the succession 

 given also from north to south, namely, from Brandon bay 

 to Feilaturrive, is as follows ■\: 



1. Dark blackish-gray clayslate, the upper beds of which 

 alternate with reddish-purple slate, some of which contain 

 Silurian fossils. 



2. Red slaty conglomerates, alternating with red and green 

 slate and brown quartz-rock. 



3. Chloritic quartz-rocks, with alternating purplish and 

 reddish-grey clayslate, similar in composition and character 

 to those of the Gap of Dunloe, and of that district generally. 



Now, on the preceding I have to observe, that, as the pre- 

 vailing dip of the strata is to the south, these rocks of the 

 Dingle peninsula may be considered as Ij^ing deeper in the 

 series than those which range in a more southerly parallel, 

 namely, as extending from Dingle bay to the lakes of Killar- 

 ney ; yet the whole, on both sides of the bay, may assuredly 

 be considered, in reference to their general composition, struc- 

 ture, and characters, as closely related to each other, and as 

 forming one sequence ; and taken in this point of view, there 

 appears no difficulty in assigning the red conglomerate, red 

 sandstone, and red slate at the entrance to and in Dunloe 

 Gap to their proper position in the series. Mr. Griffith 

 admits that in the higher parts of the Reeks (No. 4, as given 

 above) the same red conglomerate is found as occurs below 

 in the Gap of Dunloe (No. 1), the latter being succeeded by 

 the chloritic quartz-rock (No. 2), which alternates with thin 

 beds of green and purple clayslate. Again in the Dingle 

 pemnsula we find also red slaty conglomerates (No. 2 of that 

 series), succeeded by chloritic quartz-rocks (No. 3), which 

 alternate with purplish and reddish clayslate. Surely the 

 analogy here is very close, bespeaking alternations of similar 

 rocks in a line from north to south. In the Dingle peninsula 

 the red conglomerates ( No. 2) repose upon the blackish-grey 

 clayslate (No. ]), with beds of reddish-purple slate, and some 



* Lond. andEdinb. Phil. Mag. for March 1840, p. ^Q5. But the con- 

 glomerate visible in the western ranges of the Reeks, in Lisbug mountain, 

 is fully as coarse-grained as that of the Gap of Dunloe. 



t Ibid,,]). 167. 



