O'Eeilly — On Lines of Jointing of Bray Head, ^c. 
Direction relative 
to true North. 
Dip. 
56 27 E. N.W. at 59= 
65 27 E. N.W. at 60° 
58 27 E. N.W. at 60° 
58 27 E. N.W. at 60° 
No. Locality and Remarks. 
666 Do. ; beds on south side of gulley, at boun- 
dary-wall on path, 54 27 E. N.W. at 56" 
667 About 45 yards further S. ; beds here, . 63 27 E. 
668 About 200 yards further S. ; thick beds of 
greenstone, 
669 About 240 yards further S. ; thick beds of 
greenstone, ...... 
670 About 350 yards N. of "Brandy Hole" 
tunnel; the beds here seemingly disturbed 
by greenstone " necks," showing ellipsoidal 
sections, and running off at a low angle to 
S., succeeded by a vein of ground where the 
beds appear much deranged and folded, 
671 
672 Weathered thick beds of greenstone, showing 
much crumpling on weathered faces, 
673 About 250 yards N. of Brandy Hole" tun- 
nel ; thick beds, with purple, cleaved slaty 
partings, 73 27 E. N. at 72". 
674 Do. ; same beds further up bill, . . . 80 57 E. 
675 Slope on hillside, N. of "Brandy Hole" 
tunnel; quartzites, with apparent fault, . 86 33 W. S. at 70". 
676 Quartzite mass, 450 yards N. W. of N. entrance 
of this tunnel; to S.W. of fault (675), 
marked jointing (vertical), . . . 55 33 "W. 
677 This mass seemingly limited by jointing, . 68 27 E. N. at 43°. 
678 Jointing close to last, 84 57 E. N. at 54°. 
[The quartz ite here apparently bedded, 
and concordant with the greenstone beds.] 
679 Over northern entrance of tunnel; jointing 
seemingly that which gave rise to slope on 
N.W. side of tunnel, . . . . 55 3 W. N.E. at 50°. 
680 Do. ; another set of jointings, most marked, 39 33 "W. S.W. 
681 Do. do. do. do., . . 39 33 W. Vertical. 
Lesser Sugar loaf. 
682 Kilruddery deer-park ; mass of quartzite at 
base of hill, near deer-park entrance, joint- 
ing in, 15 33 W. 
683 Do. do. do. do., . . 16 33 W. 
684 Mass of quartzite (682) ; joint on E. face 
of, 44 33 W. 
686 Do. ; cut by jointing, 17 27 E. 
686 Do. ; base line of E. side of mass (about) . 33 33 W. 
687 Quartzite cliff, half-way up slope of L. 
Sugar Loaf ; general direction of face of 
cliff, N'"/S'", 21 33 W. 
Do. do. do. do., . . 18 33 ^y. 
Well-marked portion of face, . . . 16 33 W. 
Vertical. 
Vertical. 
Vertical. 
