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.

Devil's Anvil, Sheavwitz Crossing.

Devil's Anvil, Sheavwitz Crossing.