Branched Ice-Hole

This morning, the pond at Goodwood Conservation Area had no snow on it (it was -10 C). The pond was covered with these branched holes. I’ve looked them up and seen several theories as to what causes them. Most attribute it to a hole forming under the snow as it melts, which creates the branches or conduits. As the snow melts and the ice reforms, it fills in with darker, harder ice. They sure are interesting

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