Dettifoss, Iceland, July 24, 1972

Glacial Lake, Fjnllsarlon, South Coast, Iceland, August 1, 1972

Ice in Glacial Lake, Fjnllsarlon, South Coast, Iceland, August 1, 1972

Hot Spring, Mývatn, Iceland, July 23, 1972

Close-up, Dettifoss, Iceland, July 24, 1972

Cinders on Glacier near Skogar, Iceland, July 5, 1972

Heather on Lava, Hitardalur, Eastern Snaefellsnes, Iceland, July 10 ,1972

Snowbank and Ash from Eruption of Mount Helka near Dam Site on Thjorsa River, Thjorsardalur, Iceland, June 26, 1972

Columnar Basalt, Back Road to Landmannalaugar, Iceland, July 4, 1972

Blue Vitrified Lava, Craters of the Moon [National Monument], Idaho, July 2, 1975

Pahoehoe Lava Rope, Craters of the Moon [National Monument], Idaho, July 2, 1975

Alcove at Gray's Arch, Red River Gorge, Kentucky, April 18, 1968

Volcanic Rubble, Fossardalur, Iceland, August 12, 1972

Heath Plants and Rock, Oxnadalsheidit, Iceland, July 19, 1972

Lichened Rocks with Pinks, Fjardharheidhi, Road to Seydharfjordhur, Iceland, July 29, 1972

Green Sea Cliff, Berufjordhur, on Road to Hofn, Iceland, July 30, 1972

Ice in Glacial Lake, Fjnllsarlon, South Coast, Iceland, August 1, 1972

Church, Hofn, Iceland, August 2, 1972

Blueberry Flowers, Great Spruce Head Island, Maine, June 6, 1964

Split Rocks, Little Spruce Head Island, Maine, July 26, 1963