Michael Welland of Through the Sandglass has done a very superb job blogging the paper I've had open in a tab meaning to read for absolute ages now. I had one thought when I first began reading it, and it's quoting T.H. Huxley: "How extremely stupid not to have thought of that!" I'd just never considered what might happen when sand freezes on a shore and later becomes lithified.
It's really, really lovely:
If you haven't yet had a chance to peruse that post, take a few moments and treat yourselves.