Thanks to a fortuitous correspondence with Suvrat on the issues of dams, I discovered that comments to this blog over the last ten days or so may have encountered problems and never appeared (I received no notifications - possibly as a result of a blizzard of spam, that I hadn't picked up on, clogging things up). I've now deleted all the spam and added a "captcha" requirement and it seems to be working again.
However, if anyone tried to leave a comment and found that it was never
posted, I sincerely apologise - and would be delighted if you would re-post
Meanwhile, sand in the news:
1. Sand theft turns Mexican beach into a crime scene
2. Massive sand engineering project in Grand Isle, Louisiana
3. Not directly to do with sand, but dramatic - a new sinkhole in Texas (is this where the comments ended up?)
[sand alphabet courtesy of Umbrella Corporation