358 ARRAN. GEOLOGY. SCHIST. 



in parallel order by the secondary strata ; the same dis- 

 turbance attending both rocks, and the irregularities of 

 both being equal, and apparently corresponding in their 

 nature. But I must defer the consideration of the share 

 these latter strata take in this interesting place, till I have 

 described them. 



From Screeb, the schist continues to be found on the 

 eastern skirts of Goatfell, from which it may be traced 

 uninterruptedly round the western side of the mountains, 

 through Glen Rossie, as well as on the opposite side of 

 the same valley. But here, as well as in most other 

 places where it occurs, it presents nothing interesting ; 

 or nothing at least so far different from the appearances 

 already described, as to require a further detail. It would 

 doubtless be possible to multiply the observations on junc- 

 tions of schist and granite even in this part of the island ; 

 but perhaps not without much labour, or the assistance 

 of tools to clear the ground : the expense of mining must 

 in fact be incurred without the reward. The junctions 

 of the rocks just enumerated, are already too well known 

 to require any further investigation ; those of the sandstone 

 and the granite (if they really exist) offer the only stimulus 

 to such a search, and perhaps some more fortunate geolo- 

 gist may hereafter find them in the tract already indi- 

 cated. 



From Glen Rossie, the schist is found to extend to 

 the westward across the high land which forms the 

 shoulder of Ben huish and the western declivity of Ben 

 vearan; skirting Loch Huish and the head of Loch lorsa, 

 and descending to the shore near the mouth of the lorsa 

 water, to tfie point whence this topographical sketch com- 

 menced. Thus, with the exception of the doubtful narrow 

 tract on the eastern shoulders of the mountains, it forms a 

 belt surrounding the granite and separating that rock from 

 the secondary strata. Between the Machrie and the 

 lorsa rivers, the common limit of these two sets of strata 



