Traces of erosion in an unnamed crater in Terra Noachis
Traces of erosion in an unnamed crater in Terra Noachis
A distinctive edge in a layer of rock in a crater to the south-east of the Serpentis Terra in the Highlands of Noachis Terra shows the thickness of the blanket of ejecta deposited during the formation of the crater by an asteroid impact in the immediate vicinity. The deposits once scattered across the entire area were presumably kept in the immediate vicinity of the approximately 50-kilometre-wide and four-kilometre-deep crater before the erosion. The loose material was possibly solidified in the vicinity of the crater by the impact and the crater ejecta lay over it like a blanket.