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Cross Crater, about 65 kilometers in diameter, is located in the highlands of the Terra Sirenum region of Mars.

Minerals like alunite and kaolin-bearing sediments have been detected in this crater. The mineralogy inside Cross is different from other surrounding terrains and Martian basins. Waters in Cross were likely supplied by regionally upwelling groundwaters as well as through an inlet valley.


Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_016320_1490
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Sunken and Pitted Ejecta

Sunken and Pitted Ejecta

The objective of this observation was to examine the edge of impact ejecta from a crater to the north-west of this area (north is up, west is to the left).