Hidden Worlds Beneath Greenland’s Ice

Greenland landscapes beneath Greenland’s massive Jakobshavn Glacier.

Hidden Worlds Beneath Greenland’s Ice
A red line shows the main channel, and the elevation ranges from 300 to 1,300 meters above sea level, with higher elevations shown in white and brown and lower elevations in yellow and green.

The study, published in Geophysical Research Letters, reveals an extensive network of ancient rivers. These rivers predate Greenland's ice sheet by more than three million years and once drained a region that's about the size of the Ohio River basin.

Some of those river channels were more than 7 miles (11 kilometers) wide and 4,500 feet (1.3 kilometers) deep. While that’s not as big as the Grand Canyon - which reaches 18 miles (29 kilometers) wide and more than 6,000 feet (1.8 kilometers) deep - it is bigger than a megacanyon discovered beneath Greenland’s ice.

Via nationalgeographic.com

Related post: 
- First Map Of Thawed Areas Under Greenland Ice Sheet

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