OEE EE ee SS 
ERRATIC BLOCKS OF THE BRITISH ISLES. 149 
Drumaneway, esker two miles west of Randallstown. Erratics :— 
Riebeckite rock, coarse and fine, Ailsa Craig—rhyolite. 
Dervock, Carncullagh Gravel-Pit, one mile to East. Erratics:— 
Riebeckite rock, Ailsa Craig—rhyolite, pink granites, mica felsites, 
gneiss, mica schists, quartz schists, fine granite, quartzites, granite 
and quartz vein—granite, felsite with quartz and mica, sandstone. 
Ballymoney, very small Gravel-Pits, Seacon. Erratics :—Rhyolite 
—felsite, quartz-felsite—felsite, altered rhyolite. Heagles :—Rhyolite 
—chalk with manganese dendrites, granite, granulitic felsite, felsite, 
ironstone, quartzite.  Ballybrates:—Ferruginous sandstone, gneiss, 
felsite, red granite from N.E. Another small pit near (Darcus’) con- 
sisted almost entirely of basalt boulders in a stiff matrix, but sand- 
stone, red granite, and flint recorded. 
Macfin, Gravel-Pit right bank of Bann near Macfin Station. 
Erratics :—Granites, diorites, aplites, quartzites, felsites, flint, quartz. 
Coleraine, Hillman’s Fancy Sand-Pit, near Railway Station. 
Erratics :—Riebeckite rock, Ailsa Craig—pink granites, porphyritic 
granite, crushed felsite, pegmatite vein in granite, diorite, granite in 
diorite, andesite, granite, quartz felsite, syenite, felsite, red granite, 
porphyritic felsite, jasperised rock (?), felsite, granite with micaceous 
knots, andesite—chalk, flint, quartz, quartzite. 
Monaghan. Erratics:—Ferruginous jasperised shale, local, pos- 
sibly Ballyjamesduff area—sandstene, local—white chert, Carboniferous 
limestone—from canal bank—calcareous pebbly sandstones, limestone, 
dolerite, calcareous grit, sandstones, all local—felsite (?), local. From 
Threemile House, S. of Monaghan—felspathic grit ?Silurian—felsite 
porphyry, (?) Slieve Gullion—quartzite, quartz vein—sandstone, local, 
metamorphosed grit, chert, local. From esker eight miles from 
Monaghan—calcareous sandstone with cemented coating of pebbles, 
felsp. grit, felsite, chert, limestone, sandstone, local—felsite porphyry, 
(?) Slieve Gullion. 
Ballymurphy, Belfast (Springfield Brick-works), Boulder-Clay over- 
lying Trias. Erratics:—Riebeckite rock, Ailsa Craig—chalk, flint, 
chalcedony, basalt, quartzite, quartz, clay ironstone, dolerite, Rhetic, 
Lias, Old Red Sandstone, weathered granite. 
Portrush, New Waterworks, Boulder-Clay. Grey granite, West of 
Scotland. 
Glenoe, Boulder-Clay. Rhyolite (Tardree type) and a few imperfect 
ossils. 
Armagh. Granite invading hornblende rock, Tyrone axis. 
Maghaberry, near Moira. Hornblendic granite—epidiorites, Done- 
gal or Tyrone type, also Co. Derry type—quartzite, mica schist, Ailsa 
Craig rock 12 in. x 7 in. x 6 in. 
White Mountain, North of Lisburn. Riebeckite rock, Ailsa Craig, 
from an elevation of 800 feet. 
Lagan, Brickfield. Porphyritic felsite, hornblendic granite. 
