242 
Froceedings of the Royal Irish Academy. 
No. 
645 
Locality and Remarks. 
Direction relative 
to true North. 
Dip. 
Turn of road in demesne, between the two 
most eastern bosses of qnartzite ; frequent 
and close jointing in the quartzite mass, . 
Do. do. do. do., 
Do. do. do. do., 
Quartzite mass ; white quartzose seams tra- 
versing it, ..... . 
Do ; cut by a fault or joint, having caused 
derangement in rock, .... 
Do. ; set of jointings bounding the mass on 
the E., 
Do ; set of well-marked jointings here, 
Do. do. do. do., 
Do. do. dn. do., 
Third quartzite mass to S. of Head ; limiting 
joint on N. side of, . 
Do. ; cut by jointing, having given rise to 
hollow between quartzite bosses. 
Do. do. do. do., 
Most northerly quartzite mass (Survey mark 
y\. 653) ; well-marked jointing here, 
Fourth quartzite mass to S. of last, the south 
side cut off by jointing, .... 
Closely jointed all through in a direction 
roughly perpendicular to this face, . 
The continuation of this mass, cut by jointing. 
Do. do. do. do., 
Quartzite mass further W. ; cut by jointing 
(seemingly the direction of Bray shore) 
N«>/S% 
Do. do. do. do., 
Demesne-road, at about 100 yards from turn 
on summit ; the S. end of quartzite shows 
a face bearing ...... 
4 yards S. of this face ; outcrop of bedded 
green slates, ...... 
About 7 yards S. of (660) ; splintry and slaty 
greenstone dyke, ..... 
At about 190 yards to S. on road; outcrop of 
purple beds (about 5 yards broad), . 
Close to shore on E. side of hill; apparent 
continuation of these beds, 
664 Gully at old wooden bridge (548) ; above the 
path close to the boundary-wall which 
bounds the gully, beds of purple slate, 
undulated, and roughly cleaned, 
665 Do. ; cut by vertical open jointing, with 
ochreous lining, ..... 
646 
647 
648 
649 
650 
661 
652 
653 
654 
655 
656 
657 
658 
659 
660 
661 
662 
663 
Vertical, and 
W. at 58^ 
20 27 E. 
15 3 E. 
19 67 E. 
75 3 W. 
65 27 E. N.W. at 66^ 
18 3 E. 
35 27 E. 
36 27 E. 
30 27 E. 
84 33 W. 
32 33 W. 
31 33 W. 
36 27 E. 
also 
N.W. about 60° 
74 33 W. S. at 60°. 
9 33 W. 
29 33 W. 
33 33 W. 
21 33 W. 
27 33 W. 
E. at 66'. 
W. about 70^^ 
66 
27 E. 
S.E. at 42°. 
43 
33 W. 
S.W. at 42°. 
78 
3 W. 
N. at 80°. 
81 
33 W. 
N. at 72°. 
56 
27 E. 
N.W. at 68°, 
26 27 E. Vertical. 
54 33 W. 
