236 
BATHYMETRICAL SURVEY OF 
Cambrian limestone rarely appears in the undisturbed area; in the 
displaced masses west of Glas Bheinn towards the head of Loch Kishorn 
it is largely represented. 
The evidence bearing on the post-Cambrian movements obtained in 
the Loch Maree district is of special interest. On referring to the 
map, it will be seen that the belt affected by these movements runs 
southwards from Dundonnell by Kinlochewe, Beinn Eighe, and the 
Coulin forest to Glen Carron and Loch Kishorn. Throughout this 
area the geological structure is extremely complicated, but certain 
sections may be referred to as illustrating the continual variation in 
the relations of the rocks. The simplest type is met with in the 
Dundonnell forest, where on the west slope of Creag Bainich there are 
two powerful thrusts running parallel with each other for some distance 
in a north-north-east and south-south-west direction. West of these 
lines of displacement the Cambrian sequence is undisturbed from the 
basal quartzites to the Fucoid beds. On the horizon of the latter the 
first powerful thrust is met with, which brings forward a slice of 
Torridon Sandstone with a core of Archaean gneiss. Not far to the east 
the second thrust supervenes, which ushers in the crystalline schists 
overlying the Moine thrust-plane. A repetition of this structure in a 
more complicated form is found in the tract between Glen Fhasaigh 
and the heights of Kinlochewe, where the mass of displaced gneiss 
with its intrusive dykes is admirably displayed between the Moine 
thrust to the east and the outcrop of the Kishorn and Kinlochewe 
thrust-plane west of Ben a’ Vuinie. 
In the region stretching south from the head of Loch Maree by 
Beinn Eighe and the Coulin and Achnashellach forests to Loch Kishorn 
the structure is more complicated. For to the west of the two great 
lines of displacement just referred to, which have been traced south to 
Loch Kishorn and Glen Carron, the Torridon Sandstone and Cambrian 
strata have been repeated by a series of inverted folds and minor 
thrusts. Hence we find strips of Cambrian quartzite alternating with 
Torridon Sandstone, the strata having a general dip towards the south- 
east as if they formed part of a normal ascending sequence. The clear 
sections, however, on Beinn Eighe, on Sgurr Dubh, Beinn Liath Mhor, 
Sgurr Buadh, and other peaks, show the overfolding and reversed 
faults which are the prominent features of the structure of that region. 
Still further south, towards the head of Loch Kishorn, and west of the 
slice of Archaean gneiss overlying the Kishorn thrust-plane, there is a 
constant repetition of the Fucoid beds and Cambrian limestone by 
inverted folds and reversed faults. 
In the Loch Maree district, as in Assynt, there is evidence of 
the development of new structures resulting from the post-Cambrian 
movements. The deformation of the Torridon Sandstone, west of the 
Moine thrust, is well displayed in the stream south of the Kinlochewe 
