Mounds of ice in craters give new insight into Mars’ past climate
Geophysical Research Letters
The new study matches these ice layers to the tilt of Mars' axis and its orbital precession, or how the planet's elliptical orbit rotates around the sun over time, with unprecedented resolution and confidence. Sori and his colleagues turned to ice mounds in craters, just tens of kilometers wide but much fresher and potentially less complicated. After scouring much of the southern hemisphere, they pinpointed Burroughs crater, 74 kilometers wide, that has"exceptionally well-preserved" layers visible from NASA HiRISE imagery, Sori said.
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