English: The Grand Canyon, from about Mohawk to Whitmore Canyons, below the Uinkaret Volcanic Field, and the lava flow over the rim (center left) from this volcanic field (center top).

The lava flow into the gorge is en:Lava Falls, and creates one of the major river rapids, Lava Falls Rapids. The site is downdropped (to west, left) from the en:Toroweap Fault. The Hurricane Fault (to southwest Utah, see en:Hurricane Cliffs), begins here, and strikes west along the west side of the (small) Uinkaret Mountains-(north, en:Mount Trumbull Wilderness); the Toroweap Valley is just east. The Toroweap Fault strikes along the east of Toroweap Valley going north into border region of Utah. Across the river, south, the en:Aubrey Cliffs, (east border of Toroweap Fault), strikes south towards Aubrey Valley, and Seligman, AZ. The Aubrey Cliffs are the west perimeter of the en:Coconino Plateau-(the (east)-South Rim, Grand Canyon, down to Flagstaff, and the en:San Francisco volcanic field).