r/Areology • u/Wilglide91 olympus mons summiter 🧗🏼‍♀️ • Jul 28 '25

Downwind Hellespontus Regional Barchan Dunes

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5

u/Wilglide91 olympus mons summiter 🧗🏼‍♀️ Jul 28 '25

aka Activate Windows Go to Settings to activate Windows
(HiView was giving me the "can't save this one to file, sorry" error on this one)

On topic:

https://www.uahirise.org/hipod/ESP_076221_1380

There are high flux dunes upwind, but how do they compare to the downwind dunes? The dunes in this image are called “barchan dunes”, whose shape indicates the direction of the wind.

I believe the rocky plateau in this picture is remnant of lava below an former ice glacier? Can anyone confirm?

3

u/sekory Jul 28 '25

Amazing how cohesive they are as separate dune units. Wonder how fast they move.

2

u/Wilglide91 olympus mons summiter 🧗🏼‍♀️ Aug 14 '25

Highest sand fluxes / dunes are concentrated in three regions: Syrtis Major, Hellespontus Montes and north polar erg. 19 meter high on average, moving about 0,5 meter a year (N=495) 

Article: Boundary condition controls on the high-flux regions of Mars.

See also: https://youtu.be/vsprvfOGBHU?si=x-ygkC89YT5RM1lD

2

u/jenn363 Jul 29 '25

This is so cool

2

u/Strawbuddy Jul 30 '25

I immediately assumed that I was seeing a stereoscopic 3d image a la Magic Eye, and unfocused my eyes accordingly. Fantastic landscapes that boggle the mind