Canyon in Antarctica turns out to be deeper than Grand Canyon

Canyon in Antarctica turns out to be deeper than Grand Canyon

The researchers were charting the Ellsworth Subglacial Highlands-an ancient mountain range buried beneath several miles of Antarctic ice-by combining data from satellites and ice-penetrating radar towed behind snowmobiles and onboard small aircraft.

The project uncovered a massive subglacial trench, or valley, that is up to 1.9 miles (3 kilometers) deep and more than 15.5 miles (25 kilometers) across. For comparison, the Grand Canyon is 1.13 miles (1.8 kilometers) deep at its deepest point. In places, the floor of the subglacial valley is more than 6,500 feet (2,000 meters) below sea level. …

Scientists had previously known about some parts of the valley, such as Subglacial Lake Ellsworth, but they had no idea how large the trough really was until now. Ross said that his group was in a unique position to “join the dots” and discover something that others had missed.

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