As of Nov. 10, when the IceBridge scientists observed this crack, it was 70 miles (112 km) long and more than 300 feet (91 meters) wide. The dark depths of the crack plunge down about a third of a mile (0.5 km), all the way through the ice to the ocean below.
http://www.livescience.com/57109-antarctic-ice-rift-is-70-miles-long.html
https://www.nasa.gov/mission_pages/icebridge/index.html
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