Video: Mysterious giant rotating disc on the glacier

A retired engineer hunted in North Dakota, USA last Saturday spotted an ice circle more than 15 meters in diameter on the Sheyenne river.

George Loegering posted the video of this unusual online on Tuesday. Many people living in Casselton witnessed this scene, they took photos and recorded videos.

Allen Schlag, a Grand Forks meteorologist explained, the combination of low temperatures, air accumulation and a whirlpool of water on the river were the cause of this strange tape.

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