The mighty Redwall

Redwall Limestone is the red-orange cliff just below center. It's vertical in most parts of the Grand Canyon, and often includes huge amphitheatres like that at the right. It's hard to fathom from this view, but the Redwall is roughly 500 feet high!

Taken from Nankoweap Creek, on our way back to camp, the one layover day on our trip. Nice not to have to break down and set up camp for once! The Colorado River, an olive green here, is barely visible at the bottom center. This view shows all the layers above Redwall that are also familiar in the center of the park. The yellowish formations at left and right are on the flanks of Nankoweak Creek, and are an unusually steep section of Bright Angel Shale, which is a broad, rolling platform at the park center. The Redwall is naturally a greenish-gray, but is stained red by iron oxides washing down from the Supai formation above. The true color can be seen in the light-colored places where runoff from above can no longer stain it, but the rock still erodes.

Done