Mountains are formed by the upward thrust of tectonic plates, and that is why the highest mountains in the world are all relatively new. If there was no movement of the earth's crust the surface would be flat, as water and weather eroded it over time.
Old mountains like Ben Lomond are constantly breaking down. A great deal of this occurred at the end of the last Ice Age as the glacier on top of the mountain melted away and dragged rocks over the side with it.
Here we see a pyramidal pile of rocks - all formed naturally as they rolled down the mountainside and came to rest in this spot. I have used sepia here to convey something of age.
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