1912-13.] s8l 



*LVII. Dungannon, Tyrone Brickfield. Brown Boulder-Clay, 

 overlain by black Boulder-Clay. Erratics : — Jasper, green 

 rock series of Mid-Tyrone — red granite, possibly N.W. 

 Donegal — granite, possibly Donegal, probably a N.E. source 

 — granite, not like Slieve Gallion, uncommon in Donegal, 

 source probably north-eastward — ironstone nodules, dolomitic 

 limestone, red limestone, concretionary iron ore, sandstone, 

 probably local — porphyritic syenitic granite, quartz-porphyry, 

 probably Slieve Gallion — quartzite, diorite, epidiorite, Dal- 

 radian series, possibly not distant, N.-westward or possibly 

 N. -eastward — chalk, flint, gneiss, basalt, Carb. conglomerate — 

 i Carb. coral — Microzoa doubtful — brown clay yielded one 

 foram., Nonionina depressula, which may have got in 

 accidentally — in black clay, after being washed, a few round 

 stones and Carboniferous fossils were found. 



LVIII. Portstewart Sand-hills. Epidiorites, meta. grits, granite, 

 quartzites, arkose, porphyritic felsite, metamorphic sandstone, 

 Dalradian, from Londonderry, Donegal, or Scotland — rhy- 

 olite (? trachyte), Tertiary series, Antrim — coarse granite. 

 Scotland or possibly N.W. Donegal — orthoclase rock (syenite 

 group), granite, Donegal or N.E. — granite-porphyry, syenite, 

 Slieve Gallion — granite, N.E. or N.W. LI I. (earlier records). 

 Granites, probably Barnesmore — quartzite, porphyries, Cush- 

 endun area — granite, probably Cushendun dyke — riebeckite 

 rock, Ailsa Craig — schist, altered diabase with epidote. 



LIX. Limavady, Ballast-Pit near Railway Station. Erratics:— 

 Riebeckite rock, Ailsa Craig — gabbro, fels. porphyry, hypers 

 thenite, S. (Slieve Gallion) — metamorphosed grit, epidiorites. 

 quartzite, vein quartz, S. (Dalradian) — fine gneiss, N. — 

 granulite, Tyrone — red granites, hornblende schist, granite, 

 epidiorites, S. (Slieve Gallion) or N. — diorite, with granular 



*This and following numbers refer to the MSS. glacial schedules in the 

 Library of the Field Club. 

 B 



