[petuniasevan]

I was thinking about that when I posted this APOD.

You said it better than I would have!

We can tell the difference between ice-based erosion and water-based erosion on Earth; why would Mars be much different?

[Graewoulf]

Either way, the two atmospheres can be re-created in a laboratory, as well as the two soils, and then when the CO2 is added at various temperatures the effects of erosion can be directly observed.

Do you know of any such comparative test in the published literature?