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Callan Bentley's Snapshots

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  1. Boudin

    Snapshot Title: Boudin
    Taken by: Callan Bentley

    Image: Chancellor Group showing deformation, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Cross-cut by later brittle extensional veins.



  2. Flower
  3. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Chancellor Group showing deformation, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    This 1-liter Nalgene water bottle serves as a sense of scale.



  4. Refraction of cleavage

    Snapshot Title: Refraction of cleavage
    Taken by: Callan Bentley

    Image: Cleavage refraction in Chancellor slate, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Cleavage crosses bedding here, and deflects to a shallower dip as it does so.



  5. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Cleavage refraction in Chancellor slate, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Get a sense of how big the outcrop is with this sense of scale.



  6. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites and Cirque Peak, Banff National Park, Alberta, Canada.
    Image Owner: Callan Bentley



    Description:

    Spectacular deformation



  7. Stromatolite in cross-section

    Snapshot Title: Stromatolite in cross-section
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites and Cirque Peak, Banff National Park, Alberta, Canada.
    Image Owner: Callan Bentley



    Description:

    See those layers? The oldest ones are at the bottom; the youngest at the top; it domes upward toward the paleo-light.



  8. Stromatolite in cross-section

    Snapshot Title: Stromatolite in cross-section
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites and Cirque Peak, Banff National Park, Alberta, Canada.
    Image Owner: Callan Bentley



    Description:

    Layered laminations of dolostone.



  9. HCl

    Snapshot Title: HCl
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites and Cirque Peak, Banff National Park, Alberta, Canada.
    Image Owner: Callan Bentley



    Description:

    If you drop acid on these rocks directly, they will not fizz. However, if you powder the rock first, and apply the acid to that powder, you will observe a weak effervescence.



  10. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Helen Lake stromatolites and Cirque Peak, Banff National Park, Alberta, Canada.
    Image Owner: Callan Bentley



    Description:

    This pencil (with 1-cm markings along the side) serves as a sense of scale for the foreground.



  11. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Arctomys siltstone and shale, southeast of Cirque Peak, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This pencil (with 1-cm demarcations on its side) serves as a sense of scale.



  12. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

    Image: Arctomys siltstone and shale, southeast of Cirque Peak, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    No, this rock does not react (effervesce) when HCl is applied to it.



  13. Age contrast

    Snapshot Title: Age contrast
    Taken by: Callan Bentley

    Image: Rockslide in Gog Formation quartzite, trail to Helen Lake, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Fresh Gog quartzite is pinkish-white, while the boulders exposed for a long period of time have accumulated a coating of black and green lichens.



  14. Rockslide source area

    Snapshot Title: Rockslide source area
    Taken by: Callan Bentley

    Image: Rockslide in Gog Formation quartzite, trail to Helen Lake, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This is where the pinkish-white Gog quartzite broke off and fell.



  15. Hanging valley

    Snapshot Title: Hanging valley
    Taken by: Callan Bentley

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



    Description:

    With remnant tributary glacier.



  16. Icefields Parkway

    Snapshot Title: Icefields Parkway
    Taken by: Callan Bentley

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



    Description:

    North to Jasper...



  17. Debris flow chute

    Snapshot Title: Debris flow chute
    Taken by: Callan Bentley

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



    Description:

    Marked with prominent levees.



  18. Sediment plumes

    Snapshot Title: Sediment plumes
    Taken by: Callan Bentley

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



    Description:

    Where the delta feeds into the lake, suspended silt travels out a bit, and is marked by a change in water color.



  19. Braided channels

    Snapshot Title: Braided channels
    Taken by: Callan Bentley

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



    Description:

    atop the Petyo Lake delta.



  20. Medial moraines

    Snapshot Title: Medial moraines
    Taken by: Callan Bentley

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



    Description:

    Double your pleasure!



  21. Boudin necks

    Snapshot Title: Boudin necks
    Taken by: Callan Bentley

    Image: Tension gashes in Cambrian Bison Creek Formation, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Bedding-orthogonal extensional veins of calcite, occupying the "neck" between slabs (boudins) of more competent strata.



  22. En echelon array

    Snapshot Title: En echelon array
    Taken by: Callan Bentley

    Image: Tension gashes in Cambrian Bison Creek Formation, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Tension gashes forming in a common orientation due to a common stress.



  23. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Tension gashes in Cambrian Bison Creek Formation, Jasper National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This pencil, with 1-cm black bars on the side, serves as a sense of scale.



  24. Loony

    Snapshot Title: Loony
    Taken by: Callan Bentley

    Image: Bow Falls Tool Marks
    Image Owner: Aaron M Barth



    Description:

    The Canadian one-dollar coin is included to provide a sense of scale.



  25. Stromatolites

    Snapshot Title: Stromatolites
    Taken by: Callan Bentley

    Image: Cirque Peak, Banff National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Cambrian microbial mounds, fossilized.



  26. Orthogonal joint set

    Snapshot Title: Orthogonal joint set
    Taken by: Callan Bentley

    Image: Cirque Peak, Banff National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Making a cross-hatched pattern in the limestone.



  27. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

    Image: Cirque Peak, Banff National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Descending from the summit.



  28. Sweet folds

    Snapshot Title: Sweet folds
    Taken by: Callan Bentley

    Image: Cirque Peak, Banff National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Great folds on the southeast side of the mountain. Arctomys Formation.



  29. Stromatoporoid vug

    Snapshot Title: Stromatoporoid vug
    Taken by: Callan Bentley

    Image: Cairn Formation, Bow River Parkway, Alberta
    Image Owner: Callan Bentley



    Description:

    Stromatoporoid fossils (primitive, layered sponges) have been etched out to make hollows ("vugs") that can hold petroleum in the subsurface. This rock is drilled in the Edmonton area as a major reserv...



  30. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Cairn Formation, Bow River Parkway, Alberta
    Image Owner: Callan Bentley



    Description:

    This pen serves as a sense of scale.



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pekisko Formation, Lac des Arcs, Alberta
    Image Owner: Callan Bentley



    Description:

    This pen serves as a sense of scale.



  32. Stromatolite

    Snapshot Title: Stromatolite
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Viewed from the top (plan view).



  33. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  34. Stromatolite

    Snapshot Title: Stromatolite
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Top view? Bottom view? Side view? Which way is up?



  35. Stromatolite

    Snapshot Title: Stromatolite
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Is this a vertical cross-section or a plan view?



  36. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    This black bar is one centimeter long.



  37. stromatolite showing growth laminations

    Snapshot Title: stromatolite showing growth laminations
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    which way is up?



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  39. Stromatolite

    Snapshot Title: Stromatolite
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    Which way is up?



  40. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stromatolites, Helena Formation, near Crypt Lake, Waterton Lakes National Park, Alberta
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



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