1912-13.] 5 8 3 



metamorphosed sandstone, crushed felsite, South (Dalradian) 

 or North — limestone probably Carboniferous — dark red 

 granite S. ? — diorite, flints. 



LXV. Garvagh Quarries. Boulder-Clay and " Sands and 

 Gravels." Erratics : — Numerous red and pink granites, grey 

 granite, hornblendic lamprophyre (camptonite) ? andesite, 

 pebbly grits, quartz-porphyries, syenite, South (Slieve Gallion) 

 — mica schist, metamorphosed grits, quartzite S. (Dalradian) 

 or N. 



LXVI. Cookstown District, Gravel-Pits. Erratics : — Numerous 

 red and pink granites, grey granite, aplite vein, felsites, felsite 

 porphyries, syenites, diorites, crushed fragmental rock, ophitic 

 gabbro, quartz, hornblende-porphyry, pink pegmatite, quartz- 

 porphyry, Slieve Gallion — dolerite, Tyrone — banded granite, 

 ? Slieve Gallion — gneiss, Slieve Gallion or Central axis — 

 metamorphosed sandstones and grits, quartzite, N.W. 

 (Dalradian) — gneiss at junction of dolerite and granite, 

 Slieve Gallion or Tyrone axis — flint, chalk, basalt, schist. 

 Fossils — Carb. limestone with Eithostrotion and fragments of 

 encrinite stems. 



LXVIE Coalisland, Sand- and Gravel-Pits, fine current bedding. 

 Erratics : — Syenite, grey, pink, and red granites, hornblendic 

 granite, crushed felsite, felsite porphyries, quartz-porphyries, 

 fine grained gneiss, hypersthenite or pyroxenite, granite 

 porphyries, lamprophyre, felsites, Slieve Gallion — gneiss, 

 Scotland, possibly Slieve Gallion — gneiss, North — quartzite, 

 reddened by haematite, red band of Slieve Gallion — andesite, 

 Tyrone Devonian — probable insoluble residuum of siliceous 

 limestone, local Carboniferous — flint, bole, diorite, mica schist, 

 quartz. 



LXVIIL Sherrygroom, Gravel-Pit about five miles South of 

 Cookstown. Erratics : — Crushed conglomeratic sandstone, 

 Dalradian S., epidiorite N.W. (Dalradian), syenites, felsite 

 porphyry, granite (aplite in), lamprophyre, pink granites, 



