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Pegmatite dike cutting gneiss.
Pegmatite dike cutting foliated Archean gneiss, Teton Range, Wyoming. Note the chilled margin in the dike. (5D-6338)
Download ImageReverse grading in sedimentary rock
Reversely graded bed in conglomerate and sandstone of the Proterozoic LaHood Formation, SW Montana. (5D-6521)
Download ImageGlacial Valley and moraine-dammed lake.
Glacial valley and Moraine-dammed lake, Teton Range, Wyoming. Grand Teton National Park. (5D-6364)
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Folded dike in gneiss.
Folded dike in Archean gneiss, Teton Range, Wyoming. Photo is about 1.5 meters across. (5D-6286)
Download ImageFolded gneiss.
Folded Archean gneiss, Teton Range, Wyoming. Photo is approximately 60 cm across. (5D-6313)
Download ImagePegmatite sill intruding gneiss.
Pegmatite sills in Precambrian gneiss, northern Colorado. (5D-5917)
Download ImageGranite headwall, Colorado (vertical)
the headwall at the top of Glacier Gorge, a glaciated valley in Rocky Mountain National Park, Colorado. Except for the band of metamorphic gneiss in the upper quarter (left) of the photo, the rock is entirely granite. (5D-5648)
Download ImageSinclair, Wyoming and oil refinery.
Road sign for Sinclair, Wyoming. Oil Refinery in background. (5D-6174)
Download ImagePegmatite dike cutting gneiss.
pegmatite dike cutting folded Archean gneiss, Teton Range, Wyoming. (5D-6195)
Download ImagePegmatite sill intruding gneiss. (vertical)
Pegmatite sill in Precambrian gneiss, northern Colorado. (5D-5910)
Download ImageSackung in creeping soil, Colorado.
Sackung and graben in creeping soil in alpine country of Rocky Mountain National Park, Colorado. The sackung is the uphill-facing scarp on the left. (5D-6023)
Download ImageSolution pit in granite. (vertical)
Solution pit and grus and soil development in granite, Colorado (5D-5861)
Download ImageCirque and glacial valley, Colorado (vertical)
View down cirque and glacial, U-shaped valley, Colorado. The bedrock in the fore- and middle ground consists entirely of granite. Rocky Mountain National Park. (5D-5669)
Download ImageGranite glaciated peaks: Longs, Pagoda, Meeker. Rocky Mountain
These glaciated peaks in Colorado consist almost entirely of granite –except fo the large enclave of metamorphic gneiss that can be seen as a near-horizontal band in the upper third (left) of the photo. Rocky Mountain National Park. (5D-5664)
Download ImageGranite and high peaks (Pan)
Longs Peak and Pagoda Mountain, in Rocky Mountain National Park, Colorado, consist mostly of glacially-sculpted Precambrian granite. (5D-5742)
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Weathering and erosion of granite (vertical)
Weathering and erosion of fractured granite, Colorado. (5D-5580)
Download ImageUnconformity
Nonconformity (type of unconformity) between Cambrian sandstone above and Precambrian gneiss below. Mojave Desert, California. (5D-5415)
Download ImageBonneville Salt flats, Utah
Bonneville salt flats, Great Salt Lake Desert, Utah (5D-4749)
Download ImageCirque, tarn, headwall, Colorado.
Cirque, tarn, headwall; Chasm Lake and Longs Peak, Colorado. (5D-5448)
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