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Intrusive contact: basalt into granite
Close-up of intrusive contact of mafic dike into Jurassic granite, New Hampshire (241004-10)
Download ImageRoche Moutonee, New Hampshire
Roche Moutonee in the White Mountains of New Hampshire (241003-53)
Download ImageSheeting in granite, New Hampshire
Sheeting joints on Cannon Mountain at Franconia Notch, New Hampshire made of Jurassic Conway Granite (241003-46)
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Schist, Vermont
Erosion of steeply dipping schist at Warren Falls, Vermont (241002-53)
Download ImageRecumbent fold in schist, New Hampshire
Recumbently folded schist and quartz veins, Vermont (241002-6)
Download ImagePlunging Anticline, Colorado Front Range
Aerial view of folded Upper Paleozoic and Mesozoic rock along the eastern edge of northern Colorado’s Front Range. (240930-31)
Download ImageBasement gneiss, Colorado
Aerial view of Proterozoic metamorphic rock of the glaciated Mummy Range, Rocky Mountain National Park, Colorado. Mt. Ypsilon in center-left. (240930-27)
Download ImageEast-dipping Cambrian strata, Death Valley , CA
East-tilted Cambrian strata, Death Valley National Park, California. White band is the Zabriskie Quartzite –note how it illustrates the Rule of Vs. Death Valley is a half-graben situated among these tilted fault blocks. (180311-19)
Download ImageMesquite Flat Dunes, Death Valley, CA
Aerial view of sand dunes at Mesquite Flat, Death Valley National Park, California (9A91-32)
Download ImagePlaya scraper and track, Death Valley, CA
Playa scraper and track. Racetrack Playa, Death Valley National Park, California (5D-9386) sliding rock
Download ImageDeath Valley salt pan in flood
Death Valley salt pan (Badwater Basin) in flood, March, 2005, as seen from near Dantes View. Snow-capped Telescope Peak forms the high point of the Panamint Mountains in the background. (2K5-2650)
Download ImageConjugate Normal faults in siltstone
Conjugate normal faults offsetting laminated siltstone of the Miocene Monterey Formation, Santa Barbara, California
Download ImageSalt evaporators, San Francisco Bay, CA
Aerial view of salt evaporators. San Francisco Bay National Wildlife Refuge, Fremont, California (240808-60)
Download ImageTriassic Lingula brachiopods
Triassic lingula brachiopod fossils in limestone of the Dinwoody Formation, SW Montana (240726-5)
Download ImageGlacial trough, Glacier NP, Montana
St. Mary Lake, which occupies a glacial trough, Glacier National Park, Montana (240719-22)
Download ImageProterozoic armored mudballs, Montana
Armored mudballs in Proterozoic Grinnell Formation, part of the Belt Supergroup of Glacier National Park, Montana (240718-7)
Download ImageProterozoic armored mudballs, Montana
Armored mudballs in Proterozoic Grinnell Formation, part of the Belt Supergroup of Glacier National Park, Montana (240718-6)
Download ImageMississippian coral in dolomite
Mississippian-age coral in Castle Reef Dolomite, Lewis and Clark National Forest, Montana (240717-7)
Download ImagePediment and bedrock, SW Montana
Tilted sandstone bedrock and overlying pediment surface, SW Montana (240710-1)
Download Image240626-50
Sigma-type asymmetric granitic porphyroclasts in ductile shear zone. Bitterroot mylonite front, Montana (240626-49)
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