HiPOD: Week of 23 May 2022 

Fans and Polygons

Fans and Polygons
This is a place where fans emerge relatively late in the Martian spring from polygonal cracks owing to the process of sublimation. Good lighting may make it possible to catch an eruption of material that will darken the surrounding area before fading over time and moved about by the wind. This scene is at the Martian South Pole.   
A Rising Ridge

A Rising Ridge
This observation focuses a ridge that is standing above the old lava surface of the floor of Echus Chasma. What is this ridge doing here? Is it preexisting material surrounded by lava? Is it material pushed up at a restraining bend? If the ridge is not lava, it may have colorful flanks.  
Possible Impact Melt in Terra Sabaea

Possible Impact Melt in Terra Sabaea
Nighttime and daytime infrared images from THEMIS suggest a consolidated deposit in the floor of this ancient crater in Terra Sabaea, potentially with some bedrock exposure. Our goal is to examine the relationship between the surrounding crater floor and the deposit and to differentiate the deposit from nearby volcanics.  
When Lava Flows Attack!

When Lava Flows Attack!
While we have coverage of the eastern side of this crater, this view of the western flank shows that lava flows poured over the crater’s rim and down towards the interior. The flows appear to have entered from the southwest and northwest sides. Full resolution helps us take a look in greater detail at the flows.  
Layering West of Arabia Terra

Layering West of Arabia Terra
This image is based on a request to retarget a site to create a stereo pair. Adjacent images to the east show a series of buttes with very little stratigraphic overlap. The region in this observation have long sequences of strata potentially recording the full paleo-stratigraphic column that can help us learn more about the ancient environment and how it formed.