There are some wonderful examples of mechanical weathering, (Wikipedia), in some granite boulders on the summit of Mt Cannibal, (pdf).
A recent excursion to show Mrs Gouldiae ‘the great views from the top’ was foiled somewhat by the atmospheric condition at the time known as….FOG!
Anyway it was a good opportunity to snap some rocks. The results of some frost wedging in the past and some continuing organic weathering by the lichens, mosses, ferns and trees is clearly evident.
How long must it take to make some soil? Ain’t Nature grand?