This observation shows a sinuous ridge that may be an inverted stream. Streams can be inverted (become ridges) if they are made of stronger material than their surroundings.

Another way to make high-standing channels is to have water and sediment flow through a channel in the ice at the bottom of a glacier. After the glacier is gone, the sediment can be left behind, forming a ridge called an esker.

This caption in based on the original science rationale.

ID: ESP_024224_2190
date: 27 September 2011
altitude: 294 km

https://uahirise.org/hipod/ESP_024224_2190
NASA/JPL-Caltech/University of Arizona
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