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Upheaval Dome: Utah's 'belly button' that has divided scientists since its discovery

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Upheaval Dome is a rock formation in Utah with jagged peaks carved into concentric rings.

It stretches 3 miles ( 5 kilometers ) across and 1,000 feet ( 300 meters ) high.

Astronauts on board the International Space Station photographed the structure in 2007 .

Some scientists believe the dome was formed by a mountain of salt rising beneath southeastern Utah 's sandstone layers.