[ForGod'sSake]

I think this might be awfully interesting for those not color challenged like myself. Steve Dutch with the Univ of Wis-Green Bay, as he explains HERE, has taken USGS info and formatted it for the web.

It may shed some light on the present discussion about ARIZONA'S Grand Canyon; I dunno. I think I'm able to pick out the Grand Canyon on the map but since I can't do anything with the colors, it's terribly frustrating. A little help? Or if you find anything else interesting, give a shout.

[blam]

Oh boy. To many colors for me.

[ForGod'sSake]

~PING~ to #42 for comments/observations.

[SunkenCiv]

The advantage to using graphs in studies is that there are fewer pages to skip. ;’)

[Fred Nerks]

http://www.durangobill.com/ImageIndex.html

might be useful...

[Fred Nerks]

interesting image of Marble Canyon.

[Fred Nerks]

Rift Valley in the East Pacific Rise near 13°N, obtained during a dive of the CYANA submersible (CYANA in 1972); courtesy of R. Hekinian.

SOURCE LINK.

[Fred Nerks]

A robot submarine is revealing the hidden secrets of a massive underwater canyon off the coast of Portugal. At 5km deep, the Nazare Canyon is the same size as America's Grand Canyon...

[Renfield]

That’s a nice site, but it’s just about impossible to do any coherent analysis with state-scale geologic maps. We use 15-minute geologic quads at work (these are at a scale of 1” = 4000’).