

Sig
Ice accumulation on Mississippi river at the "Chain of Rocks" location. That's one of two water-intake towers next to the bridge.
A99, 24-70 CZ, F7.1, 1/1600, ISO 250.
View from the bridge. Ice circles have formed behind the Chain of Rocks low-water dam.
A99, 24-70 CZ, F10, 1/1600, ISO 200.
Close up of the ice circles.
A99, 24-70 CZ, F10, 1/1600, ISO 200.