Rock Formations Above Bright Angel Creek, Grand Canyon, Arizona, September 16, 1967

Marble Canyon of the Colorado River, Tatahatso Point, Arizona, August 11, 1969

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

Granite Schist Formation, Granite Gorge Below Sockdolager, Grand Canyon, Arizona, September 15, 1967

Granite Wall and Boulders, Bright Angel Creek, Grand Canyon, Arizona, September 16, 1967

Mimulus and Ferns, Travertine Falls, Grand Canyon, Arizona, September 23, 1967

Thunder River Falls, General View, Grand Canyon, Arizona, June 23, 1967

Edge of Sandbar with Rock, Above Bass Rapid, Mile 106, Grand Canyon, Arizona, September 17, 1967

Tamarisk on Riverbank, Whitmore Wash, Grand Canyon, Arizona, September 22, 1967

Lichen and Sagebrush Roots, Vulcan's Throne, Toroweap Point, Arizona, August 13, 1969

Surf on Rocky Beach, Isle au Haut, Maine, August 6, 1974

Tidal Estuary, Jonesport, Maine, August 18, 1974

Lichened Rocks on Shore, Little Spruce Head Island, Maine, August 28, 1974

The Top of Peak Island, Barred Islands, Maine, August 24, 1974

Wyman Lobster Pound, Stanley Cove, Maine, August 17, 1974

View from Fish Hawk Point, Great Spruce Head Island, Maine, July 30, 1974

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

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

Adélie Penguins on Snowbank, Hermit Island, Palmer Station, Antarctica, February 14, 1976

Brabant Island from Research Vessel "Hero", Antarctica, February 23, 1976