Mars Cookie Crater Still A Mystery

MARS EXPLORATION - It looks like a cookie, an apple pie, or anything else that was baked and almost boiled over. NASA’s HiRISE camera captured a mysterious, round feature on Mars. It’s like an “out-of-place object” on the otherwise smooth surface of Mars’ Athabasca region.

NASA JPL - center for robotic exploration of the solar system

NASA calls it a mound and suggests that it was created when lava pushed something up from beneath at some point in time. The organization also states that it seems like material is missing from the mound, possibly ice that melted as the lava approached. The Athabasca region has more of these enigmatic formations. What could they be?
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