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Jon Dev: Geological subjects: polygonal columnar joints in porphyritic rock, southern British Columbia
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Jon Dev: Geological subjects: vesicular lava (Eocene, British Columbia)
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Jon Dev: Geological subjects: an ancient lava flow overlying red sandstone (Eocene, British Columbia)
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Jon Dev: Geological subjects: faulting and kinking in layered rocks
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Jon Dev: Geological subjects: a fault zone in layered rocks
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Jon Dev: Geological subjects: slickenlines on a fault plane
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Jon Dev: Cliffs near Rock Creek, southern British Columbia, Canada
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Jon Dev: Kettle River valley and adjacent slopes and cliffs, southern British Columbia, Canada
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Jon Dev: Myers Creek canyon, southern British Columbia
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Jon Dev: The Canadian Rocky Mountains
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Jon Dev: A Rocky Mountain summit, Kananaskis area of Alberta, Canada
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Jon Dev: A Rocky Mountain summit, Kananaskis area of Alberta, Canada - #2
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Jon Dev: The Canadian Rockies, Kananaskis area of Alberta
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Jon Dev: The Canadian Rockies on a nice sunny day
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Jon Dev: Canadian Rockies: folded strata in Mt. Kidd, Kananaskis area, Alberta
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Jon Dev: On the road in Canada's Rocky Mountains
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Jon Dev: A typical Rocky Mountain near Canmore, Alberta
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Jon Dev: Anticline exposed in a cliffy mountainside, Canadian Rockies - #2
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Jon Dev: Anticline exposed in a cliffy mountainside, Canadian Rockies
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Jon Dev: Forested slopes and cliffs above Lake Minnewanka, Banff National Park, Canada - #2
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Jon Dev: Forested slopes and cliffs above Lake Minnewanka, Banff National Park, Canada
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Jon Dev: Rocky peaks in the Front Range of the Canadian Rockies
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Jon Dev: The Bow River in Banff National Park, Canadian Rockies
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Jon Dev: Rapids on the Bow River, Banff National Park, Canada
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Jon Dev: Arctic sedimentation, #1 - alluvial fan and braided river
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Jon Dev: Arctic sedimentation, #8 - glacier with terminal moraine flowing into the sea
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Jon Dev: Cliff of sandstone and shale above Fish Creek, Calgary - #1
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Jon Dev: Cliff of sandstone and shale above Fish Creek, Calgary - #3
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Jon Dev: Cliff of sandstone and shale above Fish Creek, Calgary - #2
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Jon Dev: Geological subjects: cliff exposure displaying an erosion surface (an incised channel)