Vol. 70.] BALLACHULISH FOLD >'EAR LOCH CBEBA>\ 327 



(2) The Refolding. — The secondary folding to which the 

 Ballachulish Core has been subjected after its development is well 

 illustrated in the sinuous outcrop of the core as shown on the 

 map (PL XLY). "Where the strike of the beds runs north-east 

 and south-west, the dips are normally very steep and directed 

 north-westwards. Even where the strike runs east and west. 

 and the dips give an indication of the pitch of the secondary 

 folding, they are still generally very high, and are directed more 

 often towards the south than the north — the exact opposite of 

 what might be expected. The pitch of the secondary folding is not, 

 however, a very clearly-defined phenomenon, for there is a sudden 

 swirl in the strike of the folding in the upper part of Allt Buidhe. 

 All that can be said is that the secondary folding is very com- 

 pressed, and of isoclinal type ; and that the local evidence furnishes 

 no clue as to which is the upper, and which the lower, side of 

 the Ballachulish Core — a point which has been determined quite 

 definitelv. however, in neighbouring 1 districts. 



,A feature of the geology noted already in previous publications 1 

 may be restated here. Between the River Creran and the Cruachan 

 Granite, there are great numbers of small intrusions of basic 

 igneous rock in the condition of hornblende-schist. Thev are dis- 

 tributed impartially on the two sides of the Ballachulish Slide, so 

 that they must be of later date than the movement along this slide. 

 Their metaniorphic condition, however, shows that they have been 

 affected by powerful movements ; thus it seems probable that they 

 antedate the secondary movements dealt with above. 



EXPLANATION OF PLATE XLY. 



Geological map of the country around the head of Loch Creran. on the scale 

 of 2 inches to the mile, or 1 : 31,680. 



1 E. B. Bailey & M. Macgregor, Q- J- Gr. S. vol. hviii (1912) p. 178. 



