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Callan Bentley's Snapshots

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  1. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Natural Bridge, Canada 2
    Image Owner: Aaron M Barth



    Description:

    Spaced cleavage planes crop out nicely here.



  2. Bedding traces

    Snapshot Title: Bedding traces
    Taken by: Callan Bentley

    Image: Natural Bridge, Canada 2
    Image Owner: Aaron M Barth



    Description:

    As viewed on the cleavage plane.



  3. Half of a dog

    Snapshot Title: Half of a dog
    Taken by: Callan Bentley

    Image: Natural Bridge, Canada 2
    Image Owner: Aaron M Barth



    Description:

    Half a man's best friend.



  4. Bioturbation

    Snapshot Title: Bioturbation
    Taken by: Callan Bentley

    Image: Striations in Eldon Formation, exposed near Athabasca Glacier.
    Image Owner: Callan Bentley



    Description:

    Mottled bedding planes where critters plowed through them.



  5. Tension gashes

    Snapshot Title: Tension gashes
    Taken by: Callan Bentley

    Image: Striations in Eldon Formation, exposed near Athabasca Glacier.
    Image Owner: Callan Bentley



    Description:

    Orange veins of calcite.



  6. Striation

    Snapshot Title: Striation
    Taken by: Callan Bentley

    Image: Striations in Eldon Formation, exposed near Athabasca Glacier.
    Image Owner: Callan Bentley



    Description:

    with small-scale "chatter" marks.



  7. Loony

    Snapshot Title: Loony
    Taken by: Callan Bentley

    Image: Striations in Eldon Formation, exposed near Athabasca Glacier.
    Image Owner: Callan Bentley



    Description:

    The Canadian one-dollar coin serves as a sense of scale.



  8. Striations

    Snapshot Title: Striations
    Taken by: Callan Bentley

    Image: Pressure solution in Eldon Formation limestone exposed on roche moutonee east of Athabasca Glacier, Jasper National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    The glacier was here, not too long ago (within the past century).



  9. Pressure solution

    Snapshot Title: Pressure solution
    Taken by: Callan Bentley

    Image: Pressure solution in Eldon Formation limestone exposed on roche moutonee east of Athabasca Glacier, Jasper National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Volume loss due to pressure solution is a better explanation for these offset marker veins. Note the difference in the distance between the two sub-veins on either side of the "fault" (really, a press...



  10. Wait a second...

    Snapshot Title: Wait a second...
    Taken by: Callan Bentley

    Image: Pressure solution in Eldon Formation limestone exposed on roche moutonee east of Athabasca Glacier, Jasper National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    ...If these are faults, then why isn't the sense of offset consistent?



  11. Loony

    Snapshot Title: Loony
    Taken by: Callan Bentley

    Image: Pressure solution in Eldon Formation limestone exposed on roche moutonee east of Athabasca Glacier, Jasper National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    The Canadian one-dollar coin serves as a sense of scale.



  12. Two buried soil horizons

    Snapshot Title: Two buried soil horizons
    Taken by: Callan Bentley

    Image: Alluvium and soil profiles
    Image Owner: Callan Bentley



    Description:

    And the implication of two overtopping floods that smothered the soil in gravel.



  13. Fast currents...

    Snapshot Title: Fast currents...
    Taken by: Callan Bentley

    Image: Alluvium and soil profiles
    Image Owner: Callan Bentley



    Description:

    ...move big cobbles.



  14. Fireweed

    Snapshot Title: Fireweed
    Taken by: Callan Bentley

    Image: Alluvium and soil profiles
    Image Owner: Callan Bentley



    Description:

    A classic wildflower of the Canadian Rockies and points north.



  15. Soil horizons

    Snapshot Title: Soil horizons
    Taken by: Callan Bentley

    Image: Alluvium and soil profiles
    Image Owner: Callan Bentley



    Description:

    ...are dark and fine-grained compared to the alluvial gravel they grow on top of.



  16. Site of sedimentary deposition #3

    Snapshot Title: Site of sedimentary deposition #3
    Taken by: Callan Bentley

    Image: Stutfield Glacier, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    End moraine (glacial till)



  17. Sediment deposition #2

    Snapshot Title: Sediment deposition #2
    Taken by: Callan Bentley

    Image: Stutfield Glacier, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Colluvium cone (rockfall) / talus "slope"



  18. Sediment deposition site #1

    Snapshot Title: Sediment deposition site #1
    Taken by: Callan Bentley

    Image: Stutfield Glacier, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Outwash gravels in braided stream.



  19. Another outsized clast

    Snapshot Title: Another outsized clast
    Taken by: Callan Bentley

    Image: Miette gritstone with outsized clast, southern Icefields Parkway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    This one of flaky greenish argillite/slate



  20. Quartz vein

    Snapshot Title: Quartz vein
    Taken by: Callan Bentley

    Image: Miette gritstone with outsized clast, southern Icefields Parkway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    A little structural geology to complicate the picture a bit.



  21. Missing clast

    Snapshot Title: Missing clast
    Taken by: Callan Bentley

    Image: Miette gritstone with outsized clast, southern Icefields Parkway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    Another clast has weathered out from here, it would appear.



  22. Antiform

    Snapshot Title: Antiform
    Taken by: Callan Bentley

    Image: Mist Mountain Formation (Kootenay Group), Canmore, Alberta
    Image Owner: Callan Bentley



    Description:

    But is it upright?



  23. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    showing internal layering "doming" upward



  24. Stromatolite layers

    Snapshot Title: Stromatolite layers
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This is a "plan" view (bedding parallel) outcrop.



  25. Eldon

    Snapshot Title: Eldon
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (inside view)
    Image Owner: Callan Bentley



    Description:

    Outcrop of Eldon Formation, showing subvertical bedding, extensional fractures, and glacial striations.



  26. Lines!

    Snapshot Title: Lines!
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (inside view)
    Image Owner: Callan Bentley



    Description:

    Which set of lines represents the trace of bedding layers? Which set represents glacial striations on the surface of the boulder?



  27. Runout

    Snapshot Title: Runout
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (inside view)
    Image Owner: Callan Bentley



    Description:

    from debris flow. Note prominent levees



  28. Source area

    Snapshot Title: Source area
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (inside view)
    Image Owner: Callan Bentley



    Description:

    for debris flow



  29. Crevasse array

    Snapshot Title: Crevasse array
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (end-on view)
    Image Owner: Callan Bentley



    Description:

    Lovely set of extensional crevasses.



  30. Tourist brigade

    Snapshot Title: Tourist brigade
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (end-on view)
    Image Owner: Callan Bentley



    Description:

    The Brewster company brings people out to the ice.



  31. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (end-on view)
    Image Owner: Callan Bentley



    Description:

    Take a closer look at the dirty terminus of the glacier in this GigaPan: www.gigapan.com/gigapans/159514



  32. Faceted clast

    Snapshot Title: Faceted clast
    Taken by: Callan Bentley

    Image: South lateral moraine, Athabasca Glacier (end-on view)
    Image Owner: Callan Bentley



    Description:

    A classic example of "faceted" morphology.



  33. Striations

    Snapshot Title: Striations
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    This boulder's been scratched by a glacier.



  34. Post depositional sorting

    Snapshot Title: Post depositional sorting
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Of till into a more concentrated coarse deposit at the base of the moraine.



  35. Cornice

    Snapshot Title: Cornice
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Showing layers of snow. You don't want to walk on top of this thing.



  36. A closer view

    Snapshot Title: A closer view
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Here's a more direct GigaPan of the Little A Glacier and adjacent Boundary Glacier: www.gigapan.com/gigapans/159489



  37. Lateral moraine

    Snapshot Title: Lateral moraine
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Couldn't ask for a nicer one.



  38. Differential weathering

    Snapshot Title: Differential weathering
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Cliff/slope/cliff trio indicates a weak layer between two resistant layers.



  39. Bergshrund

    Snapshot Title: Bergshrund
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Big crevasse at glacial headwall.



  40. Tributary glacier

    Snapshot Title: Tributary glacier
    Taken by: Callan Bentley

    Image: Athabasca Glacier with promninent lateral moraines
    Image Owner: Callan Bentley



    Description:

    Still filling its hanging valley...



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