HiRISE images show strange-looking Mars formations

[Greg Bernhardt]

Who's got some ideas?

This image from NASA's Mars Reconnaissance Orbiter is a close-up of a trough, along with channels draining into the depression. Some HiRISE images show strange-looking formations. Sometimes it helps to look at Context Camera images to understand the circumstances of a scene -- like this cutout from CTX 033783_1509 -- which here shows an impact crater with a central peak, and a collapse depression with concentric troughs just north of that peak.

https://www.nasa.gov/image-feature/jpl/pia22348/formations-in-context-or-what-is-it

 

[davenn]

the right ones remind me of glacial crevasses .. but no glaciers here

Definitely weird

 

[Chronos]

This ridges appear to be a classic example of bedforms. which result from fluid flow over sand or similar aggregates. Note how they tend to align perpendicular to 'walls' of the canyon in which they reside.