Straight Ridge-Forming Material South of Gill Crater in West Arabia Terra
HiRISE PICTURE OF THE DAY: 22 OCTOBER 2019

Straight-Forming Ridges

An earlier image of this region to the south of Gill Crater couldn’t give us much information because of haze, but now we can see these interesting straight ridges in better detail. What material helped form these? Gill Crater is named after Sir David Gill, a Scottish astronomer.



Down in Chukhung Crater
There are wavy ridges coming from the margin of a flow feature toward the center of this crater, that could be evidence of glacial meltwater preserved in the form of inverted channels.

Boundary Condition Controls on the High-Sand-Flux Regions of Mars
It is often unclear where and why sediment is mobile on today’s Mars. A new paper takes a deeper look.

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