Scientists speculate that the circular feature in question was originally an ordinary impact crater that was later filled in with sediment. The fill eventually hardened and became more resistant to erosion than the surrounding material, thus resulting in the creation of this inverted formation.
Since other craters seen on the image do not appear infilled or inverted, scientists believe that they were formed after the events that led to the creation of their inverted counterpart.
As of this moment, there are currently five orbital spacecraft engaged in the observation of Mars; two US rovers – Opportunity and Curiosity – are roaming the planet’s surface.
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Reply | 0 | Edit | Delete Maybe not filled with sediments that hardened, but a reaction between the meteorite and ground that produced a harder material. The softer ground around it was then moved away (see the parallel dunes which suggest some "current" or wind from some ancient atmosphere) ? Reply | 0 | Edit | Delete the solar system is full of curiosities like this. :)
Show new comments (0)Marques rouges
michael
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