238 
Proceedings of the Royal Irish Academy. 
No. 
565 
566 
567 
568 
569 
Locality and Remarks. 
Direction relative 
to true North. 
Dip. 
670 
571 
572 
573 
674 
b*lb 
676 
577 
678 
579 
680 
About 120 yards N. of tunnel entrance; beds 
here, 
About 100 yards do., do. do. 
About 80 yards do., do. do. 
Over tunnel, in quarry alongside path ; well 
marked beds, ..... 
Most southerly tunnel of Head. The beds 
here traversed by a series of vertical joints 
so marked, so close and frequent as to 
simulate bedding, as seen on the rock-face 
of the entrance of this tunnel, . 
Do. 
do. 
do. 
do.. 
Do. 
do. 
do. 
do.. 
Do. 
do. 
do. 
do., 
Do. 
do. 
do. 
do.. 
Do. 
do. 
do. 
do.. 
Do. 
do. 
do. 
do.. 
Do. 
do. 
do. 
do., 
Do. 
do. 
do. 
do., 
End of path S. of old houses ; beds here. 
Old houses over tunnel ; dyke of greenstone, 
showing on its S.W. side a cleaved and 
slaty band, ...... 
(The N .E. wall of the dyke presents a well- 
marked mammillated surface.) 
Old houses over tunnel ; another dyke about 
30 yards N. of last, 
E. side of tunnel ; a dyke on this side, show- 
ing well-marked glacial striation. 
Near level of sea ; system of joints so re- 
peated as to appear as beds, N'^/S'", . 
Combined with a system of jointing. 
Half-way between path and sea ; beds here, 
W. of tunnel on hill ; beds here, . 
400 yards west of old houses ; on hillside 
quartzite mass capping the hill, and show- 
ing Slikenside at outcrop, .... 
400 yards do. ; fault about 60 yards S. of 
577, being plane of separation of quartzite 
from Slikenside, ..... 
170 yards S. of old houses ; joint in quartzite 
mass, ....... 
Do. ; crossed by close jointing. 
78 33 W. 
84 33 W. 
64 33 W. 
Vertical. 
N. 60°. 
N. 77°. 
82 27 E. N. 60° 
39 33 W. 
42 33 W. 
29 33 W. 
31 33 W. 
37 33 W. 
38 33 W. 
26 33 W. 
28 33 W. 
39 33 W. 
81 33 W. 
N. at 60°. 
49 33 W. JST.E. at 80" 
50 33 W. N.E. at 77' 
50 3 W. N.E. at 70" 
21 33 W. 
50 33 W. 
55 
63 
57 E. 
27 E. 
Vertical or N.E. 
slightly. 
N.W. at 60°. 
6 27 E. E at 75°. 
65 27 E. 
27 E. 
27 E. 
Vertical. 
Greystones. 
The beds more slaty and cleared than at 
Bray Head, and much folded. 
581 30 yards S. of Flagstaff ; beds here, . . 45 27 E. N.W. at 33°. 
582 These beds cut by vertical joints lined with 
quartz, 37 27 E. 
