This observation shows a well preserved alluvial fan in Shalbatana Vallis, with exposed channel structures in its distal margins. HiRISE was requested to investigate its formation. Shalbatana Vallis contains the first definitive evidence of an ancient Martian shoreline.

ID: ESP_076844_1810
date: 18 December 2022
altitude: 266 km

https://uahirise.org/hipod/ESP_076844_1810
NASA/JPL-Caltech/University of Arizona
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