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Stream 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
Download ImageProterozoic stromatolites
Cross-sectional view of Conophyton stromatolites in Proterozoic Helena Dolomite of the Belt Supergroup of Glacier National Park, Montana Hiking poles for scale .(210724-48)
Download ImageProterozoic stromatolites
Conophyton stromatolites as they appear on a bedding surface. Note the overprinting glacial striations. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana (210724-41)
Download ImageProterozoic stromatolites
Conophyton stromatolites as they appear on a bedding surface. Note the overprinting glacial striations. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana. Pocket knife for scale (210724-40)
Download ImageProterozoic stromatolites
Conophyton stromatolites as they appear on a bedding surface. Helena Dolomite, Belt Supergroup, Glacier National Park, Montana. Pocket knife for scale (210724-39)
Download ImageCrevasses in glacier, Montana
Crevasses in Grinnell Glacier, and Upper Grinnell Lake, Glacier National Park, Montana
Download ImageProterozoic Grinnell Formation, MT (vetical)
Outcrop of Proterozoic Grinnell Formation, Glacier National Park, Montana. Purcell Sill forms the dark band in the glacial headwall in the background. (210724-17)
Download ImageProterozoic Grinnell Formation, Montana
Outcrop of Proterozoic Grinnell Formation, Glacier National Park, Montana. Purcell Sill forms the dark band in the glacial headwall in the background. (210724-16)
Download ImageCross-bedded Grinnell Fm., Montana
Cross-bedding in sandstone of Proterozoic Grinnell Formation of the Belt Supergroup in Glacier National Park, Montana (210724-14)
Download ImageCross-bedded Grinnell Fm., Montana
Cross-bedding in sandstone of Proterozoic Grinnell Formation of the Belt Supergroup in Glacier National Park, Montana . Note that it dips in two different directions. (210724-14)
Download ImageRip-up clasts in Grinnell Fm., Montana
Rip-cup clasts in sandstone of Proterozoic Grinnell Formation of the Belt Supergroup in Glacier National Park, Montana . (210724-14) Precambrian
Download ImageMt. Gould at sunrise, Glacier NP, Montana
Mt. Gould and Lake Josephine at sunrise, Glacier National Park, Montana. Note the Purcell Sill. (210724-6)
Download ImageRunning Eagle Falls and Lewis Thrust, MT
Running Eagle falls pours from slot in Proterozoic Altyn Dolomite. Foreground rocks are Cretaceous sandstone; Lewis thrust emplaced the Proterozoic rock over the Cretaceous. (210723-22)
Download ImageGlacial erratics, Friday Harbor, WA
Granitic glacial erratics deposited on sandstone at Friday Harbor on San Juan Island, Washington. Note Washington State Ferry. (210713-32)
Download ImageTwin Sisters, Washington (Pan)
Panorama view Twin Sisters, Washington –peaks composed of dunite (210713-18)
Download Image
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