Moose in Willow Flats, Yellowstone Valley, 1950s 1950–1959 · Yellowstone National Park, Wyoming, USA Conifer Ridge at Dusk, Mountain Valley, 1950s 1950–1959 The Broadmoor Hotel from Cheyenne Mountain Slope, Colorado Springs, c. 1960s 1958–1972 Stream-worn boulders and eroded streambed, limestone country 1930–1970 Aerial View of Shallow Reef or Sandbar, Tropical Waters 1940–1970 Aerial View of Volcanic Island with Steam Plumes, Mid-20th Century 1940–1960 Aerial View from Light Aircraft, Mid-20th Century 1950–1959 Mountain Valley in Mist, Early Color Photography 1940–1960 Aerial Survey of River Valley, Mid-20th Century 1950–1960 Infrared Landscape with Scattered Trees, 1960s-1970s 1960–1975 Aerial View of Cloud Bank, Mid-20th Century 1950–1965 Eroded Canyon Wall with Vegetation, Undated Geological Survey 1950–1970 Desert Wildflower, High Desert Plateau Region c. 1949 Garden flowers, 1950s color photography 1950–1959 Rocky ridge in coniferous forest, American Southwest or High Plains region 1950–1975 Grand Canyon South Rim Vista, Color Slide, Mid-20th Century 1950–1975 · Grand Canyon Mount Rainier Summit Glaciers, Washington Cascades, mid-20th century 1950–1959 Aerial View, Boreal Forest and Mountain Valley, Western Canada, c. 1970s 1950–1959 Deep-sea floor with crustaceans, deep ocean research 1960–1985 Golden Gate Bridge at Sunset from San Francisco Bay Shore, ca. 1960s–70s 1960–1978 Agricultural Valley View from Elevated Rimrock, American West, Mid-20th Century 1955–1970 Mountain Town Under Low Cloud, Western North America, ca. 1960s 1958–1972 Open-Pit Mine Workings and Waste Dumps, Western North America, 1940s 1940–1949 Storm Gathering Over Forested Ridge, 1950s 1950–1959 Quarried Stone and Mineral Deposits, Early 20th Century 1950–1955 River View from Moving Vehicle, Mid-20th Century 1950–1970 Sea Cave and Surge Channel, Rocky Atlantic or Pacific Coastline, 1950s 1950–1959 Cave Entrance with Limestone Formations and Moss Growth 1950–1959 Mountain Lake at Dusk, Mid-20th Century 1940–1965 Tidal Creek with Power Lines, Early Spring 1950–1975 Mountain stream in winter, Pacific Northwest evergreen forest c. 1940 American High Desert Through a Train Window, Likely Southwest US, Mid-20th Centu 1950–1959 Limestone cave mouth in arid terrain with erosion patterns 1950–1959 Geological outcrop with shell fragments and sedimentary layers 1950–1959 Eroded Badlands and Snow-Capped Range, American West, 1930s 1950–1959 Spanish Moss Cypress Swamp, Gulf Coast South, late 20th century 1950–1959 Grand Canyon South Rim Vista, Arizona, 1950s 1950–1955 River at Dusk, American South, 1940s–1950s 1940–1955 Rural Landscape at Sunset with Power Lines, circa 1940s 1945–1949 Yellowstone Hot Spring Pool with 1950s Visitor Parking, Upper Geyser Basin 1950–1959 Alpine meadow with limestone scarps, likely Pacific Northwest or Northern Rockie 1955–1975