HiPOD: Week of 15 August 2022 

Radial Ridges on a Crater Floor

Radial Ridges on a Crater Floor
The objective of this observation is to determine the nature of a group of short radial ridges on an old crater floor. These may be inverted channels from previous glaciers in the crater. This scene is also visible in a Context Camera image.  
On the Beauty of Martian Slope Streaks

On the Beauty of Martian Slope Streaks
Slope streaks are typically caused by the displacement of material, perhaps from a falling rock or bolder, that exposes the darker subsurface to the harsh Martian sunlight. Streaks generally fade over long periods of time. These streaks are notable not only for their wonderful shapes, but their interesting position on the rim of a small and ancient impact crater. This scene is located on the eastern side of a much larger (and older) crater in Arabia Terra.   
About a Dune

About a Dune
There are multiple dunes in this observation worth looking at! The barchan dunes might have their source in Chasma Boreale in the northern polar region of Mars that we have seen in earlier HiRISE images. Barchan dunes are notable for their croissant-shaped appearance. Our goal is to continue monitoring over several years to look for changes, the rate of changes, as well as the texture of these stunning dunes.   
A Crater near the Opportunity Landing Site

A Crater near the Opportunity Landing Site
This lovely impact crater shows distinct boulder tracks on the right-hand side, suggesting recent (perhaps ongoing?) rockfalls. There is no sign of recurring slope lineae, but if any were to happen in this region, this would be a likely location. One of our goals is to take a few monitoring images and track any changes.  
Light-Toned Material in Eastern Nectaris Montes

Light-Toned Material in Eastern Nectaris Montes
This image gives us a nice example of a light-toned rock outcropping in Valles Marineris also known as “wall rock.” Our main science goal: let’s get a closer look at the properties of this material. Is it layered? Fractured? Or perhaps superposing/pasted-on, or part of the original pre-chasm rock?