The relations are
identical, though the geographical position is reversed,--the higher
range, or the Grampian Hills, lying to the north in Scotland, and the
lower one, or the Sidlaw Hills, to the south, while in Switzerland, on
the contrary, the higher range lies to the south and the lower to the
north. I have alluded especially to Glen Prossen because the glacial
marks in that valley are remarkably distinct, the whole bed of the
valley being scratched, polished, and furrowed by the great rasp which
has moved over it, while the concentric moraines at its lower extremity
are very striking. But these signs, so perfectly preserved in Glen
Prossen, recur with greater or less intensity in all the corresponding
valleys, leaving no doubt that the same phenomena existed over the whole
region.
Among the localities of Scotland where the indications of glacial action
are most marked is the region about Stirling. Near Stirling Castle the
polished surfaces of the rocks with their distinct grooves and scratches
show us the path followed by the ice as it moved down in a northeasterly
direction toward the Frith of Forth from the mountains on the northwest.
To the west of Edinburgh, also, there is a broad glacier-track, showing
that here also the ice was ploughing its way eastward to find an outlet
on the shore.
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