Kiva – Redwall
The thickest layer of sentiment in the Grand Canyon is the Redwall — 500 -800 feet thick. The redness is thought to be iron oxide staining from layers above. It doesn’t seem to have eroded near as much as the other strata and so form imposing cliff faces. In this painting you can see the shrubs on the layer above which grow on debri being shed off the layer above which is softer. Note the small hiker profile which I used to try and get create some perspective of height of the layer. The 2 cent legal stamp commemorating the Canyon from years ago was a nice addition I enjoyed tracking down.
Here is a shot of the “mailbox” in the Phantom Ranch canteen where you put your outgoing letters :
by me from Phantom Ranch in 2011.