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Black Canyon of the Gunnison River 1

Sill intruding Cretaceous sedimentary rocks in Colorado Canyon

Solifluction lobes 2, Yukon

Canyonlands on cloudy day

Morrison Formation, in which dinosaur bones are found, showing typical colors

Beargrass (Xerophyllum tenax) scattered in forest openings 1

Precambrian conical stromatolite, 1.6. G.A., C.F.R., INC

Schuchertella orthoplicata

Dirt cone, Athabasca glacier

Bergschrund--crack where glacier separates from rock at source

Wrangell-St. Elias from the air showing numerous glacial features 7

Young Korean girl with hat and bag on street in South Korea, 1980

Bromeliads (epiphytes) growing on Cypress

Granite-diorite contact

Jailhouse in Terlingua, 1974 (it is now a rest room for a restaurant)

Badlands from west end overlook, dawn

Kame terrace, east side of Yellowstone River Valley south of Yellowstone Lake

Eoptychia intermittens hoare

Airfall tephra layers near Halema u'mau Crater

Loveland loess type section, western Iowa

Classic U-shaped glacial valley, exfoliation domes, and Half Dome

Archaeocalyptocrinus nodosus

Xenolith in basalt

Affinocrinus politus

Eucatillocrinus richardsoni

Braided stream from Kaskawulsh Glacier, St. Elias Range

Side canyon from Widforss Trail, North Rim

Multiple hoodoos

Trinitarian Congregational Church in Concord, Mass., 1977

Red firs from knob above resort

Rock glacier 3

Waterfall at Elves Chasm 4

Rialto Beach, stacks in the distance

The Fallen Cross, Green River

Cows grazing in field below volcano

Lizard on a bush

Storage tanks overrun by lava

Cross section of pediment, east side of Laramie Range, Wyoming

High peaks reflected in lake

Moscovicrinus hoskingi

Covered bridge under construction, Vt., 1968

Canyon from Whitmore Wash at end of trip

Lower, less dissected part of Bryce Canyon

Grizzly bear and cubs walking across outwash

Snowy day in the North Cascades

Deer Creek canyon 1

Rocky Mountain Erosion Surface, Wyoming

Archaeocalyptocrinus iowensis