There's a hole in the bucket
by Antonio Jordán, University of Seville, Sevilla, Spain
Some soft rocks (like siliceous sandstone, in the picture) show alveolar or differential erosion. Alveoli or cavities resulting from the repetitive blows of sand particles hitting at certain points on the surface.
Submitted on 16 May 2018
Credit: Antonio Jordán (distributed via imaggeo.egu.eu)
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