APOD: Grand Canyon Star Trails (2013 Mar 03)

Comments and questions about the APOD on the main view screen.
BDanielMayfield
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Re: APOD: Grand Canyon Star Trails (2013 Mar 03)

Post by BDanielMayfield » Mon Mar 04, 2013 6:32 pm

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?
Just as zero is not equal to infinity, everything coming from nothing is illogical.

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Chris Peterson
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Re: APOD: Grand Canyon Star Trails (2013 Mar 03)

Post by Chris Peterson » Mon Mar 04, 2013 6:38 pm

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.
Chris

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