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Slickensided fault surfaces, Montana
Parallel fault surfaces, both decorated with sub-parallel slickenlines. (IP2106-7409)
Download ImageFolded phyllite cut by quartz veins
Folded foliation of Jurassic Darrington Phyllite (of the accreted Easton Terrane) cut by quartz veins, Washington (210826-6)
Download ImageFolded phyllite cut by quartz veins
Folded foliation of Jurassic Darrington Phyllite (of the accreted Easton Terrane) cut by quartz veins, Washington (210826-5)
Download ImageFolded phyllite cut by quartz veins
Folded foliation of Jurassic Darrington Phyllite (of the accreted Easton Terrane) cut by quartz veins, Washington (210826-2)
Download ImageFolded phyllite cut by quartz veins
Folded foliation of Jurassic Darrington Phyllite (of the accreted Easton Terrane) cut by quartz veins, Washington (210826-1)
Download ImageConglomerate of Chilliwack terrane, WA (vertical)
Paleozoic conglomerate of Chilliwack accreted terrane in the North Cascades of Washington. Glaciated Mt. Shuksan forms the background. (210824-10) glaciers
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Duplex thrust faults, SW Montana
Floor and roof thrusts in limestone plus multiple “horses” of imbricated thrust faults form a duplex in Cretaceous limestone of SW Montana (210801-12)
Download ImageMeandering river and floodplain, Montana
Meandering Bighole River and its floodplain in SW Montana. Gravel-covered point bar forms the middle ground of the photo. (210801-7)
Download ImageGlacially striated bedrock and ice, MT
Glacially striated bedrock in cirque of Grinnell Glacier. Glacier National Park, Montana (210724-78)
Download ImageLake-filled glacial cirque, Montana
Iceberg laden Upper Grinnell Lake occupies much of the Grinnell Glacier cirque in Glacier National Park, Montana (210724-77)
Download ImageLake-filled glacial cirque, Montana
Iceberg laden Upper Grinnell Lake occupies much of the Grinnell Glacier cirque in Glacier National Park, Montana (210724-72)
Download ImageStream and ledges of Helena Dolomite, MT
Outflow stream and ledges of Proterozoic Helena Dolomite, Glacier National Park, Montana (210724-69)
Download ImagepC stromatolites and striations (vertical)
Proterozoic Conophyton stromatolites as they appear on a bedding surface, overprinted by glacial striations. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana. Hiking poles for scale (210724-65)
Download ImageProterozoic stromatolites and striations
Proterozoic Conophyton stromatolites as they appear on a bedding surface, overprinted by glacial striations. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana. Hiking poles for scale (210724-64)
Download ImageProterozoic stromatolites and striations
Proterozoic Conophyton stromatolites as they appear on a bedding surface, overprinted by glacial striations. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana. (210724-65)
Download ImageGlacial striations and cirque, MT (vertical)
Glacial striations and cirque of Grinnell Glacier, Glacier National National Park, Montana. Note the dark-colored Purcell Sill and the waterfall on the headwall. (210724-57)
Download ImageGlacial striations and cirque, Montana
Glacial striations and cirque of Grinnell Glacier, Glacier National National Park, Montana. Note the dark-colored Purcell Sill and the waterfall on the headwall. (210724-55)
Download ImageMudcracks in sedimentary rock
Filled Mudcracks in Proterozoic Grinnell Formation –a part of the Belt Supergroup of Glacier National Park, Montana. (210724-51) red rock
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