HiRISE 3D: A Spooky Crater
There are lots of secondary craters in this area that are well preserved, yet the main crater is extremely shallow, probably due to relaxation in ice-rich ground .
https://www.uahirise.org/anaglyph/ESP_042659_1435_ESP_033916_1435_RED
NASA/JPL-Caltech/UArizona
@Kittiekatt53 Contraction and expansion of ground ice is the hypothesis.
Not sure why the word scientists is put in quotes, but, okay.