Molting Adélie Penguins, Prospect Point, Antarctica, 1976

Folded Limestone, Ant Hill, Antarctica, January 8, 1976

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

Jaspered Fossils in Sandstone, Boysag Point, Arizona August 17, 1969

Willy, Maine, 1982

Sunset, Friars Bay, Campobello, New Brunswick, Canada, August 19, 1974

Fallen Tree Trunk, Great Spruce Head Island, Maine, July 20, 1982

Fallen Tree and Grass, Chain Links, Barred Islands, Maine, June 19, 1982

Port Clyde, Maine, 1982

Dead Branches, Large Spruce, Great Spruce Head Island, Maine, June 8, 1982

Hedgehog Cactus, Turkey Park, Chiricahua Mountains, Arizona, May 14, 1959

Seep with Green Areas, Vasey's Paradise, Marble Canyon, Arizona, June 15, 1967

View Across Colorado, Lava Canyon, Grand Canyon, Arizona, June 16, 1967

Reflections on Sand and Water at Edge of River, Mile 122, Grand Canyon, Arizona, June 22, 1967

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

Polished Limestone, Redwall Cavern, Marble Canyon, Arizona, June 15, 1967

Sandbar, Redwall Cavern, Marble Canyon, Arizona, June 15, 1967

Monoptilon bellioides, Mount Lemmon Road, Tucson, Arizona, March 4, 1953

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

Rock Formations, Upper Marble Canyon to Mile 16, Grand Canyon, Arizona, September 12, 1967