SCHISTOSE ROCKS OF NORTHERN DONEGAL. 237 



Faugher Upper. — Crystalline limestone like the beds south of 

 BalJymore. Dip at a low angle to S.S.E., passing below the 

 quartzite. This limestone is continued along the road to Dunfanaghy 

 for about a mile. 



Bound Dunfanaghy. — Quartz-schist is almost the only bedded 

 rock which appears below the limestone. It is well seen in the 

 shore, west of the town ; in quarries one mile to the S.S.W. ; in 

 Dooms Point ; and in parts of Horn Head. Near Horn Head House, 

 to the N.jST.E., the schist in a hillock presents a fan-shaped arrange- 

 ment. Elsewhere the schist dips at low angles, and is apparently 

 conformable to the limestone. 



The apparent descending succession in the metamorphic series is 

 thus summarized : — 



1 . Micaceous schist of Lough Swilly. 



2. Quartzite of Lough Swilly and Lough Salt. 



3. Schists (hornblendic and micaceous) and limestones of Lough Greenan. 



4. Similar rocks west of Croagh. 



5. JVIica-schist of Creeslough. 



6. Lead-coloured schists south of Doocashel. 



7. Q.uart^ite of Doocashel. 



8. Crystalline limestone south of Ballymore. 



9. Quartzite N.W . of Ballymore. 



10. Crystalline limestone of Faugher Upper. 



11. Quartz-schists of Dunfanaghy. 



We have seen (p. 236) that in Malin Head the granite 

 occupies the core of an anticlinal fold, with vertical strata in the 

 western limb, as if there had been a thrust from the east. In the 

 last section, too, the strata on each side of the granite are similar, 

 and the rocks on the west side are nearly vertical ; but I cannot 

 venture with my present information to say that the same structure 

 exists in both cases, though the matter is one which it would not 

 be difficult to determine. 



Section hetween the Granite north of Dunleiuy Church and the 

 Granite at Bunheg. 



This section is drawn across the same rocks as in the last tra- 

 verse, at a distance of about 12 miles to the S.W. We are here 

 near the broadened base of the granite promontory, and the con- 

 tinuation of the beds of schist west of Croagh is apparently cut out 

 by it. The following is the probable succession : — 



1. Dunlewy schists ; possibly representing the Creeslough series. 



2. Quartzite of Errigal ; apparently on the strike of the quartzite at Doo- 



cashel. 



3. Lead-coloured schists at Bunaninver Bridge. 



4. Quartz-schist between Gweedore Hotel and the western granite, and 



crystalline limestone at Bunbeg, probably on the horizon of the rocks 

 round Dunfanaghy. 



It is interesting to note that the Dunlewy schists dip to the 

 N.W., that is, in the opposite direction to their presumed equiva- 

 lents near Creeslough. This fact illustrates the difficulty, in these 

 disturbed regions, of determining the original position of the beds. 



Q. J. G. S. No. 162. s 



