Starship Asterisk*

I think we're basically on the same page now Chris. I do realize that I likely overstated the potential depth of river carved canyons. And speaking of canyon causation, was Mars' great canyon caused by erosion, by tectonic separation or by both?

BDanielMayfield wrote:I think we're basically on the same page now Chris. I do realize that I likely overstated the potential depth of river carved canyons. And speaking of canyon causation, was Mars' great canyon caused by erosion, by tectonic separation or by both?

I think most experts lean toward a combination of tectonics (rifting) and erosion (both by water and wall collapse). But it really remains an open question.