This image focuses on the mouth of Kasei Valles, as it transitions into Chryse Planitia. The region experienced extreme flooding billions of years ago, which has left its mark in this scene, as described in the associated image release.
The region was imaged by the High Resolution Stereo Camera on ESA’s Mars Express on 25 May 2016 during orbit 15714. The image is centred on 309ºE/27ºN and the ground resolution is about 15 m per pixel. It was created using data from the nadir channel, the field of view which is aligned perpendicular to the surface of Mars, and the camera’s colour channels. North is to the right.