Robin & I took a short hike up Cobb Brook yesterday afternoon. I was confident that we’d find some interesting ice formations among the stream’s numerous falls and cascades. We were not disappointed. The hilight was finding these ice discs or ice pans floating in the pool beneath one of the larger falls. These discs form as ice accumulates in slow moving eddy currents. The discs ranged in size here from around 16″ to over 3 feet.
Panasonic GX8, Lumix 14-140mm lens @ 14mm, ISO 800, f/8, 1/25″ exposure.
John Hadden Photography 
January 27, 2018 at 11:16 pm
Wow! nicely captured. Great for those of us who have never seen such an occurrence.
January 28, 2018 at 8:20 am
Thanks Tim. It was a lovely surprise. I’ve seen several different instances of this phenomenon at different scales over the years in nearby streams. There was a disc that was nearly 50′ in diameter in one of the local rivers recently.
January 28, 2018 at 2:13 pm
John, that is hard for me to image but with your photo it makes it much easier. Thanks again.