Some of the ideas discussed in this blog are published in my new book called "The Stonehenge Bluestones" -- available by post and through good bookshops everywhere. Bad bookshops might not have it....
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Friday 10 June 2022

Glacial impacts on smoothed surfaces


Beautiful things happen when glacier ice which is thick and powerful passes over relatively smooth surfaces.  First, it polishes them with various grades of sandpaper.  Then it takes tools of various sizes and uses them to fracture and damage the surface in various ways -- striations, parallel grooves and gouges, channels, crescentic gouges, chatter marks and many more features that are difficult to classify.  Every rock surface has a unique history of smoothing, grinding and fracturing.  The features are all things of beauty.  I do not really need to show these images, but some people are very slow learners!

And by the way, the last two images are from the rock surfaces at Rhosyfelin........

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