While Dan Brown was hiking with his father at Beinn Bhuidhe in the Scottish Highlands near the head of Loch Fyne, they stopped for water and looked down to see a rare and beautiful ice disc spinning at foot of the waterfall below. Brown told Metro UK that they never expected to see such a sight.
We took a break to fill our water bottles from the burn by the track – that’s when we noticed the ice disk slowly spinning at the foot of a small waterfall. …Visibility wasn’t great, but after about an hour and a half, the snow stopped and cloud cover started to clear. Neither of us had ever seen anything like it – a perfect circle of ice slowly rotating in the water, so we thought it must be a rare occurrence and took some photographs and videos.
Ice circles form through a natural phenomenon called rotational shear, in which the force of moving currents breaks off a piece of ice and spins it into a frozen disk.
Spotted these unusual ‘ice pancakes’ on the river Tyne this morning! Apparently they are a rare phenomenon- who knew?
via Boing Boing