Russell Crater Dune Gullies
HiRISE PICTURE OF THE DAY: 1 JUNE 2023

Dune Gullies of Russell Crater

We’ve seen blocks of carbon dioxide ice in these gullies several times in previous images, which are likely carving out the linear gullies. This observation is part of a potential series to try to determine: 1) how long individual blocks last; 2) whether they stop and restart, or only move once. Russell Crater is located in Noachis Terra, a southern landmass to the west of the Hellas impact basin.



Complicated Lava Cooling
This HiRISE image shows a classic example of platy-ridged lava. Scientists think that this is the same as a lava type called “rubbly pahoehoe” on Earth.

Martian Araneiforms: A Review
Araneiforms are enigmatic dendritic negative topography features native to Mars, and are found across a variety of substrates and exhibiting a range of scales.