Stratified Blocks near Killarney and Dublin* 165 
is not visible lower down: the reddish gray strata alternate as 
before with purplish gray slate. As we ascend and ap- 
proach the summits of the Coumeen Peest, or eastern ridge 
of the Reeks, the strata assume a more decidedly red charac- 
ter, till at length they pass into brick or cherry-red quartz 
rock, and contain some beds of conglomerate, identical in 
colour, composition, and structure with the old red sand- 
stone already described, situated to the north of the fault in 
the Gap ofDunloe, but not quite so coarse-grained These 
red quartzose or old red sandstone beds differ materially from 
the schistose beds of the lower part of the series. The" struc- 
ture of the rock is decidedly granular, the strata are thinner^ 
and they are divided by joints into rectangular masses, while 
the schistose beds beneath usually present rhomboidal forms. 
The conglomerate on the top of the Reeks is perfectly con- 
formable with the underlying strata, and in fact a regular 
gradation may be traced from the lower or chloritic portion 
of the series through the gray and reddish gray into the brick- 
red quartz rock and conglomerate. 
^ From the summit of the Reeks still proceeding in a southern 
direction towards the valley of Kenmare, we do not find these 
old red sandstone strata dipping to the southward, as shown 
on Mr. Hamilton’s section already mentioned, and published 
in the Journal of the Geological Society of Dublin, but on 
the contrary they crop out to the southward, forming a re- 
gular cap resting conformably on the inferior strata, whose 
ends appear in the precipitous escarpment visible on the 
northern side of the valley of CoomydufF, in the bottom of 
which the green chloritic beds already described as occur- 
ring near the fault in the Gap of Dunloe again make their 
appearance, and the whole succession of the strata and pass-* 
age from the green chloritic beds to the red conglomerate as 
already described on the northern acclivity of the Reeks, may 
likewise be traced on the southern. 
It is unnecessary to enter into any further particulars re- 
specting the detail of the succession of the strata between the 
valley of CoomydufF, and the reappearance of the old red 
sandstone at Lisinisky, to the north of the valley of Kenmare, 
as it is clearly shown in the section, and the same gradation 
of colour and character, from the green to the red rocks, is 
observable. See Plate II. fig. 1. 
The old red sandstone of the valley of Kenmare consists of 
* The conglomerate visible near the summit of Lisbug mountain on the 
western ranges of the Reeks, is fully as coarse-grained as that of the Gan of 
Uunloe. * 
