Mount Erebus, Departure from McMurdo Station on U.S. Coast Guard Cutter "Glacier," January 16, 1976

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

Sea Ice, the Minnow [Islands], Prospect Point, Antarctica, March 6, 1976

Sea Ice, the Minnow [Islands], Prospect Point, Antarctica, March 6, 1976

Small Crater Lake, Deception Island, Antarctica, February 26, 1976

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

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

Reeds and Reflections, Buck Farm Canyon, Marble Canyon, Grand Canyon, Arizona, September 14, 1967

Water Flowing in the Chasm, Deer Creek, Grand Canyon, Arizona, June 24, 1967

Side View of Lower Falls, Travertine Falls, Grand Canyon, Arizona, June 29, 1967

Choke Stone, Tuckup Canyon, Grand Canyon, Arizona, September 21, 1967

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

Rock Tripe, Great Spruce Head Island, Maine, July 28, 1974

Juniper Tree and Cliff, near Toroweap Point, Arizona, August 13, 1969

Lichen and Quartz Vein, Little Spruce Head Island, Maine, August 28, 1974

Lichen and Quartz Vein, Little Spruce Head Island, Maine, August 28, 1974

Lichen and Quartz Vein, Little Spruce Head Island, Maine, August 28, 1974

Railway Worker, Grand Central Station, New York City

Sponge Market, Key West Harbor, Fla.

Ptarmigan.