284 BATHYMETRICAL SURVEY OP 



these are associated bands of garnet, amphibolite, and hornblende 

 schist that have been mapped for some distance both in the Fannich 

 mountains and near Scardroy, in the basin of the Meig. In some areas 

 schists of the ultra-basic type appear that represent original masses of 

 peridotite. This group forms isolated areas or inliers in the midst 

 of the Moine series, being regarded as older than the latter, and 

 probably representing the floor or platform on which the members of 

 the Moine series rest. It is significant that different bands of the 

 so-called Lewisian gneisses in the Conon basin are in contact with the 

 crystalline Moine schists of sedimentary origin, and that different 

 subdivisions of the latter overlap the former. 



These gneisses of Lewisian type appear at intervals, sometimes 

 forming comparatively narrow zones, and, again, rather broad belts. 

 On the north and west slopes of the Fannich mountains they have been 

 traced for several miles, being there overlain and underlain by the 

 flaky muscovite biotite schists of the Moine series. Southwards between 

 Strath Bran and the basin of the Meig, near Scardroy, there is a large 

 development of them, where their relations to the Moine schists are 

 well displayed. They likewise appear in Glen Orrin, and southwards 

 towards Glen Strathfarrar, and eastwards near Loch Luichart. 



With the exception of certain masses of foliated and unfoliated, 

 intrusive, igneous rocks, the members of the Moine series occupy the 

 rest of the area covered by the crystalline schists. Their lithological 

 characters are comparatively uniform. The two main subdivisions, 

 already indicated, graduate into each other in certain localities, thus 

 forming an intermediate type between the highly quartzose granulitic 

 schists on the one hand and the flaky muscovite biotite schists on the 

 other. The members of the Moine series, which have the largest 

 development and the widest distribution, consist of granulitic quartz- 

 schists or quartz biotite granulites, but the pelitic schists sometimes 

 form the most elevated ground, as, for instance, on Sgurr Mor Fannich 

 (3637 feet), the highest of the Fannich mountains.* The boundary line 

 between the two main subdivisions of the Moine series is highly involved, 

 showing intricate rapid folding, frequently isoclinal, and pointing to 

 intense reduplication of the strata. The most prominent belts of the 

 garnetiferous muscovite schists have a wide distribution in the basin of 

 the Conon. For example, they appear in the Fannich mountains, and 

 extend south-west by Ben Fionn and Loch Rosque to Moruisg, east of 

 Glen Carron. They likewise appear in Glen Orrin and Glen Meig, 

 and prominent bands have been traced more or less continuously from 

 Strath Bran north-north-west by Aultguish and the hills west of Strath 

 Vaich to Glen Beg and Glen Alladale, in the basin of Strath Carron. 



* The quartz-schists contain pebbly bands in places, thus clearly showing their 

 derivative origin. 



