January 15, 2005
Saturday

Ketchikan, Alaska - Foam coming downstream gets caught in a backwater eddy where the stream changes direction. There it keeps twirling trying to get back to the main stream only to be drawn back into the eddy. The foam keeps revolving against each other and forming disks - and with the freezing temperatures, forms ice foam disks.

These disks are about 1 to 1 1/2 inchs thick and perhaps 10 to 12 inches in diameter. When the photographer first saw them, he said he thought that someone had thrown lids from a five- gallon bucket into the water. 

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