Question: What are those wiggly ridges/channels/veins? Are they rivers/river deltas?
-
by
Portyankina
scientist
Answer: Those wiggly line structure are actually troughs in the Martin surface. Several of these troughs that converge to one central point are called spiders (or araneiforms). But sometimes they randomly cover area (lace terrain) or form something like polygonal terrain. The troughs are carved by carbon dioxide gas, not liquid water, as one could first think from their appearance. It is too cold in this areas for liquid water, about -123C. More details on the process of troughs formation is here http://planetfour.org/#/about or also here http://blog.planetfour.org/
Anya
Posted
-
by
Marswalker
Sometimes the troughs are clearly not dark marks, but sometimes there seem to be dark marks that are neither fans nor true blotches, though can look a little like blotches that then run along the line of the trough. I am erring on the side of completeness by trying to include them all, but sometimes it isn't too easy to decide.
Posted
-
by
Portyankina
scientist
Hi!
i think, you are better off marking only fans and blotches now. We are working on tools to allow you also mark spiders, though it is complicated to invent a tool for it. But we'll get there eventually.
Anya
Posted
-
by
Ian_Mason
The wiggly ridges are not where space weevils have been burrowing then. 😦
😃
Posted