] 12 
JOURNAL OF THE GEOLOGICAL SOCIETY OF DUBLIN. 
Foot, of the Geological Survey, in the district placed under his ex¬ 
amination ; lying to the east of Mangerton, it forms the main mass 
of Bennaunmore Hill, one of the range of mountains lying directly 
south of Lough Quitane. In extent it is three-quarters of a mile 
from N. to S., and about a quarter of a mile E. and W. These traps 
are green and greenish-gray felstones, often porphyritic; and along 
the gorge to the east of Bennaunmore, they form magnificent ranges 
of columns from fifty to sixty feet in perpendicular height; in 
one place these columns are traversed by a dyke of pink felstone, 
six to eight feet in thickness. 
Columnar Felstone, east face of Bennaunmore Hill, soutla of Lough Quitane, 
Killarney. 
I shall not attempt further details connected with this most 
interesting locality, as I believe it is the intention of Mr. Foot to 
bring a notice of it before this Society. 
The rocks observed at the Devil’s Punch-bowl belong apparently 
to that portion of the Old Red between the lower green and middle 
purple beds, and are faulted in a N. W. direction, at the cliffs to 
the east of the Lake. 
In alluding to the trap rocks, Mr. Du Noyer called attention to 
a protrusion of fissile brecciated, as well as compact greenstone, 
occurring in the midst of the Carboniferous Limestones in the parish 
of Subulter, three miles east of Kanturk; it forms a hill of about 
half a mile from N. to S., and a quarter of a mile from E. to W., 
having the limestone dipping away from it in every direction. His 
