380
C. CALLAWAY ON THE NEWEK GNEISSIC
S
©
&2
SO
Section up the Cascade from
Dliuloch More (east end of fig. 5).
— The facts here described occur
within one mile to the south of the
section to which reference has just
been made. They are well seen
in the wild gorge occupied by the
infant Oykel as it cascades down
from the elevated tarn of Dhuloch
More (1500 feet). The bottom of
the valley (900 feet) is formed of
the Quartzite, which sweeps down
in undulating sheets from the
lofty ridge of Brebag. The dip is
E.jST.E. at 15°. This rock is con-
tinued up the stream to about
1000 feet, where it is conformably
overlain by Brown Flags, Salte-
rella-qivdrtzite *, and between 20
and 30 feet of the Dolomite.
Thus far the succession is normal.
"Resting on the Dolomite, appa-
rently in conformable succession,
is about 100 feet of reddish
felspathicgrit(Nos. 92, 93, p. 417),
which, towards the top, rises in
dip to nearly 90°, and is overlain
by red and green gneiss, with ob-
scure bedding. A little higher up,
this gneiss dips easterly at a low
angle ; and following it to the
high ground above, it is seen to be
continuous with that which forms
the chief mass of Ben More.
The grit, overlain by similar
gneiss, rather soft and decayed, can
be traced for more than two miles
to the south along the steep
escarpment which overhangs the
eastern side of the Oykel valley.
The gneiss forms the vertical cliff
crowning the scarp. Below it the
grit occupies the slope, and is ex-
posed in several small cascades.
Towards the south, green grit
begins to be intercalated with the
red variety ; and on the stream
from Dhuloch Beg the colour is

• This band, owing to its thinness, is