Tree and Mountain Valley, Great Smoky Mountains National Park, Tennessee, March 11, 1969

Lichen-covered Boulders, Big Bend Ranch, Texas, October 29, 1978

Yellow Trees on Canyon Wall, Lower Shutup, Big Bend Ranch, Texas, November 5, 1978

Lichens on Ionic Capital, Temple of Aphrodisios, Turkey, April 5, 1971

Hedgehog Cactus, Solitario Uplift, Big Bend Ranch, Texas, November 5, 1978

Hedgehog Cactus, Solitario Uplift, Big Bend Ranch, Texas, November 5, 1978

Pine Tree on Altar of Zeus, Pergamon, Turkey, April 2, 1971

Weathered Stump, Cape Meares, Oregon, July 16, 1975

Mount Adams and Dead Tree, Washington, July 20, 1975

Waves, Gulls, Tidal Pool, Second Beach, Olympic Peninsula, Washington, July 26, 1975

Terraces in Brook, Aztec Creek, Forbidden Canyon, Utah, August 28, 1961

Mud Ripples, Hidden Passage, Glen Canyon, Utah, September 22, 1961

Pool and Rocks, Music Temple, Glen Canyon, Utah, September 23, 1961

Chamita, New Mexico, October 1940

Pool and Reflections, Grand Gulch, San Juan River, Utah, May 23, 1962

Cienega, New Mexico, October 1940

Truchas, New Mexico, November 1940

Shiprock, New Mexico, October 1940

Chama River, New Mexico, October 1940

Chama River, New Mexico, October 1940