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Alteration along fractures in serpentinite
Alteration along fractures in serpentinite (IP18-0971)
Download ImageDismembered pegmatite in gneiss
Folded and dismembered pegmatite in gneiss. Photo is about 1 meter high. (IP18-0966)
Download ImageStylolites offset by faults in quartzite
Stylolites and bedding offset by faults in quartzite (IP18-0942)
Download ImagePlagioclase phenocrysts in basalt
Plagioclase phenocrysts in Steens Basalt–the earliest part of the Columbia River Basalt Group (CRBG) (181017-66)
Download ImagePlagioclase phenocrysts in basalt
Plagioclase phenocrysts in Steens Basalt, the oldest part of the Columbia River Basalt Group (CRBG), Oregon. Photo is about 20cm across. (181118-65) close-up
Download ImageGlacial Valley, Steens Mountain, Oregon
Glacial, U-shaped valley carved into lavas of the Steens Basalt. Little Blitzen River, Steens Mountain, Oregon (181017-52)
Download ImagePlagioclase phenocrysts in basalt
Plagioclase phenocrysts in Steens Basalt, the oldest part of the Columbia River Basalt Group (CRBG), Oregon. Penny for scale. (181118-44)
Download ImageBasaltic feeder dikes, Steens Mtn., Oregom
Feeder dikes and lava flows of Steens Basalt, Steens Mountain, Oregon. (181017-36)
Download ImageGlacial Valley, Steens Mountain, Oregon
Glacial, U-shaped valley carved into lava flows of Steens Basalt. Wildhorse Canyon, Steens Mountain, Oregon (181017-33)
Download ImageGlacial Valley, Steens Mountain, Oregon
Glacial, U-shaped valley, eroded into lava flows of the Steens Basalt. Big Indian Creek Canyon, Steens Mountain, Oregon (181017-25)
Download ImageTumalo in basaltic lava flow, Oregon
Tumalo in basaltic lava flow. Diamond Craters, Oregon (181017-20)
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Ash flow tuff. Smith Rock State Park, Oregon
Ash flow tuff. Smith Rock State Park, Oregon. Reddish tower on the right side is a rhyolite dike. (181016-32)
Download ImageAsh flow tuff. Smith Rock State Park, Oregon
Ash flow tuff and Crooked River, Smith Rock State Park, Oregon. (181016-28)
Download ImageIceland’s W Rift Zone (Pan)
Iceland’s western Rift Zone at Thingvellir National Park. (Thingvellir2pan) extension, normal faults, scarps
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Acadian Granite, Maine
Acadian granite atop Cadillac Mountain in Acadia National Park, Maine (100608-127)
Download ImageRoche Moutonee, Maine (Pan)
Group of roche Moutonee in Frenchman Bay, Maine. The asymmetry of these glacial erosional features indicates left -to -right (east to west) ice movement. (100608-101)
Download ImageRoche Moutonee, Maine
Roche Moutonee in Frenchman Bay, Maine. The asymmetry of this glacial erosional feature indicates left -to -right (east to west) ice movement. (100608-97)
Download ImageRoche Moutonee, Maine
Roche Moutonee in Frenchman Bay, Maine. The asymmetry of this glacial erosional feature indicates left -to -right (east to west) ice movement. (100608-87)
Download ImageGlacial Erratic, Maine (vertical)
Giant granitic boulder, a glacial Erratic on top Cadillac Mountain, Acadia National Park, Maine. (100608-72)
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