Large boulders are strewn along the shore of Loch Ness. It seems likely that they have fallen down from the slopes above. It is not unknown for the road that closely hugs the shoreline to be blocked when there is a landslide of similar boulders. The rock composition is interesting. The loch lies along the Great Glen Fault which has been subject to earth movements long ago. Some of the boulders were clearly made up of a composite of smaller rocks solidly embedded in a matrix. I wonder if these would be classified as conglomerate or breccia from the fault crush zone.
My attempts to find out about the geology of the area are confounded by the complexity of the geology in the Scottish Highlands. I have bought a few books that I hope will help me to get a basic idea of the lie of the land before I venture north again in the summer. There are many to chose from and it is clearly one of the most geologically fascinating places in the world as well as the most scenic. Meanwhile, prior to undertaking the homework, the following link provides some information about the area. http://southlochnessheritage.co.uk/geology-of-glen-mor/
Judging by the coatings of lichen, at least some of the bankside boulders have lain for a while by the peat-stained tea-coloured clear waters of the loch, which on this sunny early summer day were calmly rippling ashore and reflecting the blue sky above.