Author: Carolyn Gramling / Source: Science News
Greenland’s ice may be hiding more than one crater left by long-ago meteorite impacts.
An analysis of satellite and airborne images of the topography beneath the ice sheet has revealed a large, craterlike structure buried beneath two kilometers of ice. It’s just 183 kilometers southeast of Hiawatha, another possible large impact crater described in November (SN: 12/8/18, p. 6). The newfound bowl-shaped object is about 36.5 kilometers across, slightly larger than the 31-kilometer-wide Hiawatha depression, researchers report online February 11 in Geophysical Research Letters.
Like Hiawatha, the new feature consists of a ring-shaped rim surrounding a depression with a peak at its center…
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