Cascade Above Gorge, Deer Creek, Grand Canyon, Arizona, September 19, 1967

Large Square Boulder, Tuckup Canyon, Grand Canyon, Arizona, September 21, 1967

Moss at Bottom of Falls, Travertine Falls, Grand Canyon, Arizona, September 23, 1967

Barrel Cactus, Mile 122, Grand Canyon, Arizona, June 22, 1967

Reflections with Boulders, Buck Farm Canyon, Marble Canyon, Grand Canyon, Arizona, September 14, 1967

Sandbar, Mouth of Little Colorado, Grand Canyon, Arizona, September 14, 1967

Deer Creek Gorge, Grand Canyon, Arizona, September 19, 1967

Iron-stained Stone, Lava Canyon, Grand Canyon, Arizona, June 17, 1967

Sand Dune and River's Edge, Green Reflections, Mile 122, Grand Canyon, Arizona, June 22, 1967

Neumayer Passage to Bismarck Strait from Research Vessel "Hero", Antarctica, February 24, 1976

Krameria parvifolia, Madrona Ranger Station, Saguaro National Monument, Arizona, April 18, 1953

Echinocereus triglochidiatus, Saguaro National Monument, Arizona, April 19, 1953

Palo Verde and Saguaros, Saguaros National Monument, Arizona, May 15, 1958

Tamarisks and River, Above Granite Rapids, Grand Canyon, Arizona, June 19, 1967

Sculptured Schist, Tuna Rapids, Grand Canyon, Arizona, June 21, 1967

Tamarisks and River, Above Granite Rapids, Grand Canyon, Arizona, June 19, 1967

Icebergs, Ross Sea, from U.S. Coast Guard Cutter "Glacier," January 1976

Iceberg and Ice Blink, Amundsen Sea From United States Coast Guard Cutter "Glacier", Antarctica, February 1976

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

Limpet Shells Left by Gulls, Bonaparte Point, Palmer Station, Antarctica, February 11, 1976