667 
of Edinburgh, Session 1877 - 78 . 
rocks. When the sea retired, the boulders would then be on the 
drift, or buried in it. But when the streams from the hill sides 
began to flow and to remove the drift, the boulders would sink until 
rock was reached by them, where, of course, they would remain. 
The denudation of the old sea-bottoms has been everywhere so exten- 
sive, that very probably most of the boulders now existing are not 
in precisely the exact positions which they occupied when originally 
deposited. 
6. In the Pass of Brander , where the Biver Awe flows out of 
the lake of the same name, there are several boulders deserving 
notice. 
On the right bank of the river, near the spot where there is a 
pier for the small lake steamer, there are two terraces on drift. 
Both terraces have boulders on them. The boulders are of reddish 
granite. The rocks in the Pass are a slaty schistose rock like 
greywacke. The boulders have apparently come from some distant 
region, as the granite of the Loch Etive hills is not red, but almost 
entirely grey in colour. 
The height of Loch Awe above the sea is (by Ordnance Survey) 
110 feet. The lowest terrace is 68 feet, the higher terrace about 
120 feet above the loch. 
Both terraces appear to be horizontal. They can be traced for 
nearly a mile continuously. 
On the opposite or left bank of the river no corresponding 
terraces are distinguishable. That side of the valley consists of 
nearly bare rock, and is almost vertical, so that there cannot be 
expected to be on it any trace of a beach line. 
Have these terraces in the Pass of Brander been formed by a lake 
or by the sea 1 ? In a lower part of the valley there is a large amount 
of detritus, and it reaches at some places to a higher level than the 
terraces. The valley in that lower part is narrow, so that there 
might have been a blockage for a lake. On the other hand, 
how can the granite boulders be accounted for which are on the 
terraces 1 If, as seems most probable, they have come from the 
north, they must have been floated by ice on a current flowing 
from the N.N.W. 
7. Inveraray . — His Grace the Duke of Argyll (Nov. 1876) con- 
ducted the Convener to a small hill, about 1000 feet above the sea, 
