HiRISE: Is that an impact crater?

ESP_049075_0995This image was acquired to take a closer look at a circular feature that might be an impact structure on the South Polar layered deposits.

Measuring the sizes and frequency of impact craters provides a constraint on the age of the landscape. However, craters in icy terrain are modified by processes that flatten and change them in such a manner that it is hard to say for sure if it had an impact origin. [More at link]

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