APOD: Grand Canyon Star Trails (2013 Mar 03)

Comments and questions about the APOD on the main view screen.
BDanielMayfield
Don't bring me down
Posts: 2524
Joined: Thu Aug 02, 2012 11:24 am
AKA: Bruce
Location: East Idaho

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.

User avatar
Chris Peterson
Abominable Snowman
Posts: 15821
Joined: Wed Jan 31, 2007 11:13 pm
Location: Guffey, Colorado, USA

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

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com