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Black Canyon of the Gunnison River 1

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

Two kinds of dinosaur tracks in rocks in Dakota Hogback, Denver

Subalpine forest of lodgepole pine, aspen, spruce, and fir near Bear Lake

Getting ready to float through Dinosaur on the Yampa River

Cliff rose (Cowania) at Colorado National Monument

Parabolic sand dunes, eastern Colorado, from the air

Near vertical walls of Black Canyon of the Gunnison River

View looking down at kiva

High peaks of Front Range from Arapahoe Peak area

Looking down river from Black Canyon of the Gunnison River

Dinosaur tracks in Cretaceous Dakota Hogback

Colluvium over alluvium, Big Thompson Canyon, Colorado 1

Balcony House from across valley

Petroglyphs of lizard

Pulling into small safe place above nasty hole

Waterfalls after downpour illustrating how desert varnish forms streaks

View of valley from Colorado National Monument

View of entrance road showing Mancos Shale and Point Lookout Sandstone from Mancos Valley

Pagoda Peak west of Long's Peak

Treeline on Trail Ridge Road

Beautiful bison petroglyph

Closer view of nasty hole, Warm Springs rapid

Paracromyocrinus molasensis &

Musing about desert varnish in side canyon

Mitten Creek Fault and draga fold

Joint in Wingate Sandstone, view east over Grand Valley

Entering Yampa Canyon

Hogbacks in Fountain Formation at Red Rocks park

Sudden shower, Trail Ridge

Entrance road showing Mancos Shale and Point Lookout Sandstone

Waterfalls off canyon walls after downpour

Cooling off up side canyon of Yampa River

Cactus full of blooms

Spruce krummholz, Trail Ridge Road

Great Sand Dunes National Park up against the Sangre de Cristo Mountains

Black Canyon of the Gunnison River 2

Cliff Palace

High Peaks of Front Range near Arapahoe Peak

Lower (east) end of Rocky Mountain Erosion Surface near Boulder

Moraines in Horseshoe Park 1

View of geologic section showing Mancos Shale, Point Lookout Sandstone, Menefee Formation, and Cliff House Sandstone

Batholiths in the Front Range, Colorado

Echo Park, where incredible echoes bounce off wall

Caliche, Rocky Flats, Colorado 1

View of Grand Valley and Colorado River at dawn

Rapids warning sign is nearly obscured by high water

Hoodoos and pillars in jointed Wingate Sandstone