216 
BATHYMETRICAL SURVEY OF 
below the surface of Loch Maree, whilst the distance between the two 
100-feet contour-lines at this place is 120 yards, and that between the 
two 150-feet contours is 550 yards. 
The shallow water to the north of the islands is much more remark- 
able. A large part of this area is under 50 feet in depth, and the 
deepest water that occurs anywhere between Creag Tharbh and Hudha 
Chailleach is 79 feet, though it is along this northern channel that the 
great fault must run. Bight in the middle of the channel, underneath 
Creag Tarbh, the water is only 41 feet in depth; the hills on the north 
shore rise steeply up to heights of over 2000 feet in places, and the 
slope up to the 1000-feet contour-line is at an angle of 45°; hence the 
difference between the sub-aerial and the sub-aqueous slopes is in this 
place very marked. Budha Chailleach (the witch’s point) is a narrow 
spit of shingle stretching out to a considerable distance into the loch, 
with deep water close to the shore. From this point a narrow channel 
of deeper water projects right across the loch towards the opening 
between Eilean Subhainn and Garbh Eilean. 
The ridge between the Slattadale and Ghruididh basins is merely a 
continuation of the islands. The depths on it are much less than on 
either of the other ridges; there is, however, a fairly deep channel, 
through which the steamer passes, ranging in depth from 62 feet to 
28 feet; this channel is narrowest and shallowest between Isle Maree 
and Eilean Eachainn. To the south of Isle Maree is a large sand-flat, 
which in July, 1902, was covered by less than a foot of water, and on 
which were many boulders rising above the surface of the water. 
The areas between the consecutive contour-lines, and the per- 
centages to the total area of the loch, are as follows : — 
0 to 
50 feet 
2090 acres 
29*6 per cent. 
50 „ 
100 
1283 
,, 
18-2 „ 
o 
o 
150 
1066 
151 
150 „ 
200 
>5 
877 
59 
12-4 „ 
200 „ 
250 
977 
95 
13-9 
260 „ 
300 
J > 
412 
9 9 
5-8 „ 
300 ,, 
350 
254 
9 9 
3-6 „ 
Over 
350 
- 
99 
99 
1-4 „ 
7058 
9 9 
100 0 
It will be observed that the zone between 200 and 250 feet is larger 
than that between 150 and 200 feet, otherwise the areas between the 
contour-lines drawn in at equal intervals decrease gradually with 
increase of depth. 
The Small Loch on Eilean Subhainn . — ’Apparently this loch has not 
been considered important enough to receive a name, but the fact that 
it had the appearance of being of some depth, whereas the other lochs 
on the islands on Loch Maree are overgrown with weeds or moss. 
