ON THE GEOLOGY OF THE LAKE DISTRICT OF KILLARNEY. 103 
this portion of the upper Old Red are to the south, at from 30° to 
40°, but here a refolding of the beds on each other is evident, which 
spreads them out to the extent of 2500 feet, in a north and south 
direction. Their normal thickness, however, of 400 feet, as mea¬ 
sured in Muckross Demesne, would be quite sufficient to cover this 
extent of surface. 
It is a remarkable fact, and one which is not sufficiently accounted 
for, that, on the west of the Glena fault, the upper Old Red rests con¬ 
formably on the middle purple beds, while the latter are totally 
wanting on the east of the fault, the upper beds there resting on 
greenish-gray grits, with a few purple slates through themrocks 
in short, partaking more of the character of the lower Old Red 
Sandstone, to be presently described. 
The Dinish Island upper Old Red extends as far south as the 
old weir bridge, where many sharp refoldings of the beds can be 
seen, giving a very good idea of the mode in which these rocks 
occur, to the west, as well as on the south shore of Tore Lake, where 
they lie at the base of Tore Mountain. The upper Old Red rocks 
which form the northern base of Tore Mountain can be best observed 
in ascending the stream forming Tore Waterfall; they consist of 
flaggy and irregularly bedded yellow and brown grits, with a few 
purple slates, light green shales, and light brown sandy layers, and 
light brown sandstones with purple slates; these beds are contorted 
repeatedly. Over Tore Waterfall are grayish-yellow flaggy sand¬ 
stones; greenish-yellow shales; yellowish-brown quartzose grits, 
with purple slates: all these rest on the lower Old Red Sandstone, 
greenish-gray grits and purple slates, both being inverted in dip, 
that is, inclining to the south at 20°. The upper Old Red rocks, 
just described, stretch along the north flank of Tore Mountain, 
westerly, for the distance of about 2200 feet, when they are cut off 
by a fault striking in a N. and S. direction, from the “ Quay ,? close to 
Tore Cottage; by an upcast to the west of this fault, their boun¬ 
dary is shifted to the north, for the distance of probably 500 feet; 
a second north and south fault, to the west of the one last observed, 
occurs near the boundary of Tore townland. This can be well ob¬ 
served in the stream forming this boundary; and the upper Old 
Red beds included between these two faults are much contorted, 
as can be well observed along the road skirting the Lake, where con- 
glomeritic layers occur in the yellowish-gray grits, the pebbles 
