Superior Ice & Volcanoes
Photos with simple explanations courtesy of |
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Superior IceSee more videos of ice flows in the Duluth Harbor Entry by the Army Corps of Engineers |
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Superior - Keewenau Region Lake IceSee more images and explanations here. |
Ice in cross section with bubble trains (~30 cm high). The air bubbles look like jellyfish tentacles. The white top on this slab is probably snow ice, snow that at some point flooded and refroze to become snow ice. |
Slush ice congregates in blobs, perhaps rotating in the current, leading to a generally rounded or oval shape. The blobs jostle against one another in the waves, compacting and pushing up the ice around the edges, forming the distinctive raised rims characteristic of pancakes. |
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Ice Volcanoes of Duluth & Superior's South ShoreSee more images and explanations here. |
Karl Kakuk examines the “ice volcano” on Orange Street in Duluth. The ice structure is created by a spurting fire hydrant the city runs all winter to keep the supply line from freezing and breaking. From Lake Voice News.
Observer flees as the underestimated wave approaches the ice volcano. |
Looking across the pack ice to an arc builidng atop a rock reef. The center ice volcano is "erupting".
Shadows of the observes projected onto the "erupting" ice volcano. Notice "erupted" blocks of material on surface. |
