Limestone to Sandstone Endless, treacherous, dispiriting, switchbacks, six-point-nine miles to perdition on the South Kaibab. Here, we’re transitioning from limestone to sandstone indicating the proximity to The Plateau. Share this:TwitterFacebookLike this:Like Loading... Related Published by Nico Publishes Steel Wheels - The Tao Of Motorcycling: http://steelwheelsblog.com View all posts by Nico