174 A Geological Trip. [Sess. 
Ben More at the head of Glen Beg. We can see in this 
section how the long band of quartzites lying on the archzan 
gneiss, which in its 
normal position should 
be continued under- 
ground, dipping to the 
east, has been brought 
up to the surface, and 
with it great masses 
of the gneiss. The 
figure plainly shows 
how the whole up- 
heaved mass has been 
thrust forward along 
glvLs 
TWWYON NM) WL dy 
IVNINO 
> 
i} Be : definite thrust planes, 
re Be haha till the quartzites and 
ieee ce Raut tee Det — -»~ limestones to the west 
© bus {8 E #2] have been completely 
Sy oe re a : overwhelmed, and we 
> oH 2 = eae find the anomaly in 
Beis bas f 2 ' | the field of the older 
=. z= st, £| rocks superimposed on 
& fee = those of a much later 
= Lon? ; date geologically. This 
S ' A| magnificent section can 
& pak PM, be well seen at Inch- 
2 ‘a > us te nadamff, and gives to 
2 a £ €| the eye the impression 
> e bs : of a great range of 
7 pi? mountains which has 
*£ eS!) been brought bodily 
i RE 3 forward. I believe 
these great disturb- 
ances are supposed to 
have taken place 
about the time that 
the volcanoes of the 
Lower Old Red Sand- 
stone period were 
pouring out their lavas, which are to be seen so largely 
