One of many great views down Cottonwood Canyon along the Supai traverse below the Coconino Saddle on the Grandview Trail; look closely at the opposite wall of the canyon, the Redwall Limestone is distinctly bent as it passes over the axis of the Grandview – Phantom Monocline, the apex of the fold containing an inverted, conical, 320 million-year-old sinkhole later filled with mud and rubble and transformed into Surprise Canyon Formation breccia pipe.