An esker is a long ridge of sediment deposited by meltwater from a retreating glacier or ice sheet. Although glaciers are common on Mars, in the prevailing very cold and dry climate they are thought to be almost exclusively cold-based systems, which do not experience subglacial melt. These candidate eskers could be important to our understanding of non-climatic drivers of meltwater production and, potentially, habitability.

ID: ESP_065710_2170
date: 2 August 2020
altitude: 294 km

https://uahirise.org/hipod/ESP_065710_2170
NASA/JPL-Caltech/UArizona
#Mars #science #NASA