Sculptured Rock, near House Rock Rapids, Marble Canyon, Arizona, June 13, 1967

Sculptured Rock, near House Rock Rapids, Marble Canyon, Arizona, June 13, 1967

Blueberry Leaves and Maple Trunks, Passaconaway, New Hampshire, October 7, 1952

Yellow Leaves and Asters, Sangre de Cristo Mountains, Santa Fe Basin, New Mexico, September 20, 1950

Water-streaked Wall, Warm Spring Canyon, Lake Powell, Utah, September 24, 1965

Livingston Island and Green Iceberg, from Royal Vessel Hero, Antarctic Peninsula, March 10, 1976

Reflections on Edges of River, Mile 122, Grand Canyon, Arizona, June 22, 1967

Reflections on Edges of River, Mile 122, Grand Caynon, Arizona, June 22, 1967

Hedgehog Cactus with Terpentine Bush, Madrona Ranger Station, Saguaro National Monument, Arizona, April 13, 1953 [Echinocereus Triglochidiatus and Aplopappus Laricifolius]

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

Wiencke Island, Bismarck Strait from Research Vessel "Hero", Antarctica, February 24, 1976

Ice and Snowbank, Litchfield Island, Palmer Station, Antarctica, February 11, 1976

Antarctic Sun, Double by Refraction, Ross Sea, from U.S. Coast Guard Cutter "Glacier," January 24, 1976

Reeds and Reflections, Deer Creek Mouth, Grand Canyon, Arizona, September 20, 1967

Edge of Colorado River with Reflection, Mile 197, Grand Canyon, Arizona, June 28, 1967

View of Lava Falls, Toroweap Point, Arizona, August 13, 1969

Mirabilis multiflora, Toroweap Point, Arizona, August 13, 1969

Grass and Limestone Boulder, 29 Mile Rapid, Marble Canyon, Arizona, June 15, 1967

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

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