Megadunes

Alternative definitions (1), class: vernacular (0)
Term: Megadunes
Definition: Unlike snow dunes that are piles of drifted snow, antarctic megadunes are long, undulating waves in the surface of the ice sheet that are 2 to 4 meters (6.5 to 13 feet) high and 2 to 5 kilometers (1 to 3 miles) apart; they are slightly rounded at their crests and are so subtle that a person on the ground cannot see the pattern.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary
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