Sand sculpture, Grand Cañon.

Lava cone, Devil's Hole, Arizona.

Perched rock, Rocker Creek, Arizona.

Chocolate mesa, Rocker Creek, Arizona.

Vermilion mesa, Rocker Creek, Arizona.

Mt. Range, near Castle Valley.

The "Vermillion cliff," a typical plateau edge, as seen from Jacobs Pool, Arizona.

Kanab Wash, Colorado basin.

Colorado River, below the Paria.

Colorado River, below the Paria.

Mt. Range, near Castle Valley.

Chocolate Butte; mouth of the Paria.

The northern wall of the Grand Cañon of the Colorado, near the foot of To-ro-weap valley.

The northern wall of the Grand Cañon of the Colorado, near the foot of To-ro-weap valley.

Grand Cañon of the Colorado.

Grand Cañon of the Colorado.

Cross-bedded sandstone, Kanab, Utah.

Mt. Range; Castle Valley in distance.

Cross-bedded sandstone, Kanab, Utah.

Cross-bedded sandstone, Kanab, Utah.

Cross-bedded sandstone, Kanab, Utah.

Cross-bedded sandstone, Kanab, Utah.

Weathered limestone, Grass Valley, Utah.

Fish Lake Beach, Utah.

Non-conformable Strata, Salina Cañon, Utah.

Colorado River, above the Paria.

Sevier river at Gunnison.

Grand Cañon; Sheavwitz Crossing.

Grand Cañon; Sheavwitz Crossing.

Grand Cañon; Sheavwitz Crossing.