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606 D. MILNE HOME ON THE PARALLEL ROADS OF LOCHABER.
accum Illations. Loch Laggan, Looh Treig * Loch Lochy, and Loch Arkaig are
examples. Arkaig is specially interesting, because there is evidence to shew,
that at some former period it discharged into Loch Lochy by a channel different
from the present one. The old channel is situated at the N. E. end of the lake,
and forms a deep dry ra\ine, called "the Park JNIile." The present channel of
discharge is at the S. E. corner. Near the mouth of the lake there is a horizontal
terrace, about 90 feet above the present surfixce, formed on detritus, Avhich
suggests that the lake once stood at a higher level.
Loch Laggan now discharges its surplus waters by the River Spean, which
has cut for itself a trench about from 30 to 40 feet below what had been here
the bottom of the lake. One side of the trench is shown on fio\ 4. It
Loch Laggan (1) now Jischavging its surplus waters by the River Spean (2). About a quarter
of a mile below the Loch, the Spean is joined by the River Gulbain (3). IJoth rivers have
cut deep trenches through the old bottom of the Lake, viz., the lake which formed Shelf 4.
forms a cliff running for several hundred yards towards the Avest, till it joins
another cliff almost at riglit angles, M'liicli has been formed l)y the Eiver Gulbain.
The material cut through by both rivers consists of sand, and fine clay in
horizontal beds, formerly the bottom of the lake which formed Shelf 4. The
trench cut by the river would have been deeper, but for rock over which the
Spean flows where it runs out of the lake.
In my former paper, I referred to a case somewhat analagous, Avliere a lake
had subsided from one level to another, and which is kept up at its present
level by detritus. This lake is Loch Tulla, about 3 miles long and 1 mile broad,
situated about 40 miles S. W. of Glen Roy. Chamheks, after I had pointed
out this lake, as a case supporting my theory, visited it, and in his book on
Sea Margins admitted the correctness of my statements, as to the horizontality
* Mr .Tamieso.n (page 2-50, "London (iuo. Soc. Pro.," 2 1 st Jann.-iry 1863), admits Louli Trcig, in its
oulHow, "has not even yet cut its way to the very bottom, for the lake is still partly rctaiiwd by hanlis oj'
i/ravel. "
accum Illations. Loch Laggan, Looh Treig * Loch Lochy, and Loch Arkaig are
examples. Arkaig is specially interesting, because there is evidence to shew,
that at some former period it discharged into Loch Lochy by a channel different
from the present one. The old channel is situated at the N. E. end of the lake,
and forms a deep dry ra\ine, called "the Park JNIile." The present channel of
discharge is at the S. E. corner. Near the mouth of the lake there is a horizontal
terrace, about 90 feet above the present surfixce, formed on detritus, Avhich
suggests that the lake once stood at a higher level.
Loch Laggan now discharges its surplus waters by the River Spean, which
has cut for itself a trench about from 30 to 40 feet below what had been here
the bottom of the lake. One side of the trench is shown on fio\ 4. It
Loch Laggan (1) now Jischavging its surplus waters by the River Spean (2). About a quarter
of a mile below the Loch, the Spean is joined by the River Gulbain (3). IJoth rivers have
cut deep trenches through the old bottom of the Lake, viz., the lake which formed Shelf 4.
forms a cliff running for several hundred yards towards the Avest, till it joins
another cliff almost at riglit angles, M'liicli has been formed l)y the Eiver Gulbain.
The material cut through by both rivers consists of sand, and fine clay in
horizontal beds, formerly the bottom of the lake which formed Shelf 4. The
trench cut by the river would have been deeper, but for rock over which the
Spean flows where it runs out of the lake.
In my former paper, I referred to a case somewhat analagous, Avliere a lake
had subsided from one level to another, and which is kept up at its present
level by detritus. This lake is Loch Tulla, about 3 miles long and 1 mile broad,
situated about 40 miles S. W. of Glen Roy. Chamheks, after I had pointed
out this lake, as a case supporting my theory, visited it, and in his book on
Sea Margins admitted the correctness of my statements, as to the horizontality
* Mr .Tamieso.n (page 2-50, "London (iuo. Soc. Pro.," 2 1 st Jann.-iry 1863), admits Louli Trcig, in its
oulHow, "has not even yet cut its way to the very bottom, for the lake is still partly rctaiiwd by hanlis oj'
i/ravel. "
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| Early Gaelic Book Collections > J. F. Campbell Collection > On the parallel roads of Lochaber > (30) |
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| Permanent URL | https://digital.nls.uk/80970370 |
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| Description | By David Milne Home. From the Transactions of the Royal Society of Edinburgh, vol. XXVIII. |
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| Shelfmark | Cam.1.a.1(1) |
| Additional NLS resources: | |
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| Description | Volumes from a collection of 610 books rich in Highland folklore, Ossianic literature and other Celtic subjects. Many of the books annotated by John Francis Campbell of Islay, who assembled the collection. |
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| Description | Selected items from five 'Special and Named Printed Collections'. Includes books in Gaelic and other Celtic languages, works about the Gaels, their languages, literature, culture and history. |
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