On the Granitic Blocks of the South Highlands of Scotland

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Abstract
On a visit to the Highlands of Scotland in the summer of 1849, my attention was directed by my friend Mr. Smith, of Jordan Hill, to the blocks of granite which are scattered along the banks of the Clyde. Proceeding thence to Oban, I found on the shores about that place, and on the neighbouring shores of Loch Etive (see Map), similar blocks, but larger and more numerous. These were easily traceable to their source, the mass of granite immediately on the north and north-west of Ben Cruachan, and extending across the upper branch of Loch Etive. In like manner I observed numerous blocks about the head of Loch Awe, on the south-east of Ben Cruachan (see Map) ; and these also were easily traced to the above-mentioned mass of granite up the valley of Glenray, which runs in a north-easterly direction from the head of Loch Awe on the eastern side of Ben Cruachan. Proceeding afterwards to Loch Lomond, I found granite blocks scattered along its western shore; and I observed them in great numbers also round the head of Loch Long and of Loch Fyne. The source of these blocks presented a great apparent difficulty.

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