Reflections on Edges of River, Mile 122, Grand Canyon, Arizona, June 27, 1967

Yellow Columbine, Bear Canyon, Santa Catalina Mountains, Arizona, May 27, 1958

Jasper Veins in Boulder, 29 Mile, Marble Canyon, Arizona, June 15, 1967

Pools in Limestone Boulder, 29 Mile Rapid, Marble Canyon, Arizona, June 15, 1967

View Up River with Boulders, Granite Rapids, Grand Canyon, Arizona, June 20, 1967

Canyon End in Sun, Spook Canyon, Marble Canyon, Arizona, June 16, 1967

Down Colorado from Lava Canyon Entrance, Grand Canyon, Arizona, June 16, 1967

Cat Claw and Boulder, Tuna Rapids, Grand Canyon, Arizona, June 21, 1967

Tamarisk and Jimsonweed, near House Rock Rapids, Marble Canyon, Arizona, June 13, 1967

Prickly Pear Cactus, Madrona Ranger Station, Saguaro National Monument, Arizona, April 25, 1953

Approach to Deception Island from Research Vessel "Hero", Antarctica, February 27, 1976

Mount Francais, Bismarck Strait from Research Vessel "Hero", Antarctica, February 24, 1976

Guano-covered Rocks, Cormorant Island, Palmer Station, Antarctica, February 14, 1976

Guano-Covered Rocks, Cormorant Island, Palmer Station, Antarctica, February 14, 1976

Chinstrap Penguins Porpoising, Nelson Strait, 1976

Molting Adélie Penguins, Cormorant Island, Palmer Station, Antarctica, February 14, 1976

Collapsing Glacier Edge, Prospect Point, Antarctica, March 6, 1976

Cormorants Roosting, Cormorant Island, Palmer Station, Antarctica, February 21, 1976

Yellow Pumice Boulders, Deception Island, Antarctica, February 26, 1976

Pack Ice (Sunlight), Ross Sea, from U.S. Coast Guard Cutter "Glacier," January 1976