Catastrophic outburst floods carved Greenland's 'Grand Canyon'
Thursday, April 30, 2020 - 13:00
in Earth & Climate
Buried a mile beneath Greenland's thick ice sheet is a network of canyons so deep and long that the largest of these has been called Greenland's "Grand Canyon." This megacanyon's shape suggests it was carved by running water prior to widespread glaciation, but exactly when and how the island's grandest canyon formed are topics of intense debate.