Carter Johnson at Sica Hollow State Park in South Dakota
Carter Johnson Doctorate Field Research
Tree Coring Missouri River Floodplain
Sheyenne River North Dakota Geology Field Trip
Hummocky Ground, North Dakota Farm
Road Cut Exposing Glacial Till
Ancient Shoreline Marked by Exposed Rocks
Glacial Till, Central North Dakota
North Dakota Farm Effects of Grazing
Glacial Till Exposed at Road Cut
Bristlecone Pine
Snow Covered Forest and Mountains
Rolling Field
James Peak, Colorado
Marty Burkel and Edmund Hubbard
Sica Hollow State Park Nebraska and South Dakota
Alpine Plant Colorado Rocky Mountains
Alpine Tundra Plant (Erysimum nivale) Colorado
Alpine Tundra Plant (Lloydia cerotina) Colorado Rockies
Alpine Plant (Geum Rossi) Colorado Rocky Mountains
Meadow Plant, Colorado Rocky Mountains
Parasitic Plant Forest of Colorado Rockies
Strawberry Plant Colorado Rocky Mountains
Buttercup Alpine Colorado Rockies
Buttercup Through Snow, Rocky Mountain National Park
Meadow Plant Colorado Rocky Mountains
Cushion Plant, Alpine, Colorado Rockies
Doll's Eyes, Rocky Mountain Colorado
Black Sedge Alpine Colorado Rockies
Alpine Tundra near Niwot Ridge Colorado Rocky Mountains
Alpine Tundra Plant Rocky Mountain Colorado
Niwot Ridge, Colorado Alpine, Rocky Mountains
Andrews Glacier and Lake Colorado Rocky Mountains
Andrews Glacier Colorado Rocky Mountains
Alpine Tundra Colorado Rocky Mountains
Sedge Hummocks Colorado Alpine Tundra
Rocky Fell Field Mountains of Colorado
Treeline Colorado Rocky Mountains
Vegetation and Stream Colorado Rocky Mountains
Colorado Rockies near Estes Park
Treeline Central Colorado Rockies
Alpine Tundra and Lake near Timberline Colorado Rockies
Rocky Fell Field Colorado Rockies
Colorado Rockies
Landscape View of Colorado Rockies
Flag-Form Trees Colorado Rockies
Dr. Harold Lutz Lecturing University of Colorado Mountain Ecology Class
Landscape View, Colorado Rockies
Famous Alpine Ecologist John Marr Lecturing University of Colorado
Dr. Paul Kilburn Summer Instructor of Mountain and Alpine Ecology Classes
Andrews Glacier and Valley Rocky Mountains Colorado
Campground near Estes Park, Colorado
Dr. John Marr Lecturing to Alpine Ecology Class
Andrews Glacier
Arctic and Alpine Valuable Plant for Science
Reflective Tarn Downslope of Andrews Glacier
White Flowers
Over mature Columbine, Colorado State Flower
Mountain Laurel
Primroses Meadows of Colorado Rocky Mountains
Columbine, Colorado State Flower
Sunflower Relative Colorado Rocky Mountains
Flag-Form Trees near Timberline Colorado Rockies
Buttercups in Melting Snow, Colorado
High Mountain Alpine Plant
Old Man of the Mountain Sunflower (Hymenoxys Grandiflora)
Cushion Plant, Colorado Alpine
Alpine Clover Colorado Rockies
Alpine Willow Rocky Mountains of Colorado
Dwarf Willow Alpine Colorado Rockies
Alpine Plant Colorado Rockies
Tiny Primrose Alpine Rocky Mountains
Forget-Me- Not Cushion Plant, Colorado Rockies
Pika above Timberline Rocky Mountain National Park
Bristlecone Pine Krummholz on James Peak Colorado
Barren, Rocky Slope Alpine Colorado Rockies
Bristlecone Pine near Timberline James Peak, Colorado
Bristlecone Pine Krummholz James Peak, Colorado
Close-up of Bristlecones Pine Krummholz
Bristlecone Pine Krummholz James Peak, Colorado
Tree Line James Peak Colorado
Bristlecone Pine Krummholz James Peak, Colorado
Alpine vegetation
Krummholtz on James Peak, Colorado
Glacier-formed cirque in Colorado
Krummholtz on James Peak, Colorado
Krummholtz on James Peak, Colorado
Stream line vegetation in Colorado
Aspen trees in Colorado
James Peak in Colorado
Flag form trees in Colorado
Stone stripes in Colorado
James Peak in Colorado
Colorado Rockies
Niwot Ridge in Colorado
Glacier-formed cirque in Colorado
Colorado Rockies
Alpine tundra in Colorado
Glacier-formed cirque in Colorado
Fungus on fir tree in Colorado