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Callan Bentley's Snapshots

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  1. Stress field?

    Snapshot Title: Stress field?
    Taken by: Callan Bentley

    Image: Carbonatite dikes, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Extended? Compressed? Both?



  2. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Carbonatite dikes, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

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



  3. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Carbonatite dikes cutting across Chancellor Group slate, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

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



  4. Stromatoporoid vug

    Snapshot Title: Stromatoporoid vug
    Taken by: Callan Bentley

    Image: Cairn Formation, Bow River Parkway, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Empty space - could be rented to any petroleum that's passing through.



  5. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Cairn Formation, Bow River Parkway, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This 52 mm lens cap serves as a sense of scale.



  6. Sigmoids

    Snapshot Title: Sigmoids
    Taken by: Callan Bentley

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



    Description:

    Asymmetric calcite vein boudins. What's the sense of shear?



  7. 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.



  8. Flower
  9. 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.



  10. 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.



  11. 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.



  12. 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



  13. 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.



  14. 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.



  15. 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.



  16. 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.



  17. 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.



  18. 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.



  19. 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.



  20. 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.



  21. 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.



  22. 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...



  23. 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.



  24. 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.



  25. 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.



  26. 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!



  27. 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.



  28. 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.



  29. 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.



  30. 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.



  31. Stromatolites

    Snapshot Title: Stromatolites
    Taken by: Callan Bentley

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



    Description:

    Cambrian microbial mounds, fossilized.



  32. 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.



  33. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

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



    Description:

    Descending from the summit.



  34. 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.



  35. 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...



  36. 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.



  37. 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.



  38. 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).



  39. 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.



  40. 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?



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