A rare weather phenomenon known as ice boulders have formed in Lake Michigan. This video captures several of them floating along the shoreline at sunset.

The video was shot January 18, 2016 along at Silver Beach in St. Joseph by videographer Joshua Nowicki.

Ice boulders are, according to Huffington Post,

rounded and smoothed by waves constantly washing over them, and they grow larger as ice coats the boulders, freezing in thin layers.

The form occasionally in winter when the weather conditions are right.

Lake Michigan, more often than the other Great Lakes, are the home to ice boulders with photos and video going viral in recent years of the phenomenon captured in the northern portion of the lake around Sutton's Bay, Sleeping Bear Dunes and the Leelanau Peninsula.

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