GLEN ROY, IN SCOTLAND. 
71 
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 north¬ 
west. To the w r est 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. 
The western slope of the great Scotch range 
is no less remarkable for its glacier-traces. 
The heads of Loch Long, Loch Fyne, Loch 
Awe, and Loch Leven everywhere show upon 
their margins the most distinct glacial polish 
and furrows, while from the trend of these 
marks and the distribution of the moraines, 
especially about Ben Cruachan, it is obvious 
that in this part of the country the glaciers 
moved westward and southward. About Aber¬ 
deen, on the contrary, they moved eastward, 
while in the vicinity of Elgin they advanced 
toward the north. 
It thus appears that the wdiole range of the 
Grampians formed a great centre for the dis¬ 
tribution of glaciers, and that a colossal ice- 
