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Callan Bentley's Snapshots

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  1. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

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



    Description:

    The black bars on the side of this pencil are each 1 cm long.



  2. Structure, par excellence

    Snapshot Title: Structure, par excellence
    Taken by: Callan Bentley

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



    Description:

    Awesome look at the different structures that form in layers of variable composition. The upper stiff layer exhibits extensional fractures, while the lower more cleaved layer shows cleavage concentrat...



  3. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

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



    Description:

    This pencil serves as a sense of scale. The black bars on its side are each 1 cm long.



  4. Rip-up clasts

    Snapshot Title: Rip-up clasts
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Mudchips speak of an earlier episode of low-energy deposition, followed by a violent erosive episode.



  5. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Which way was the current flowing?



  6. Scour channel incision

    Snapshot Title: Scour channel incision
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Nice curved concave-up contact between coarse overlying bed and finer underlying bed.



  7. Scour channel base

    Snapshot Title: Scour channel base
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    Trace this contact out to the left (overlying coarse bed gets thicker) and the right (overlying bed gets thinner).



  8. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    There is no reaction to HCl when applied to either fresh or powdered rock.



  9. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Miette gritstone with scour incision and mudchip rip-up clast-rich strata, Banff National Park, Alberta, Canada
    Image Owner: Callan Bentley



    Description:

    This pencil serves as a sense of scale. The black bars along its side are each 1 cm long.



  10. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Miette Group slate, Trans-Canada Highway and Icefields Parkway junction, Banff National Park
    Image Owner: Callan Bentley



    Description:

    See this elliptical thing? What is it? Check it out in more detail with this close-up GigaPan:
    www.gigapan.com/gigapans/159378



  11. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Miette Group slate, Trans-Canada Highway and Icefields Parkway junction, Banff National Park
    Image Owner: Callan Bentley



    Description:

    Examine this area in more detail with this GigaPan: www.gigapan.com/gigapans/159469



  12. Shiny luster

    Snapshot Title: Shiny luster
    Taken by: Callan Bentley

    Image: Ripple marks and phyllitic sheen in Miette Group slate, Icefields Parkway and Trans-Canada Highway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    Low grade metamorphism has imparted a phyllitic sheen to these rocks.



  13. Ripple marks

    Snapshot Title: Ripple marks
    Taken by: Callan Bentley

    Image: Ripple marks and phyllitic sheen in Miette Group slate, Icefields Parkway and Trans-Canada Highway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    Signatures of currents in the Neoproterozoic sea.



  14. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Outsized clast (dropstone?) in Miette Group gritstone, southern Icefields Parkway, Banff National Park
    Image Owner: Callan Bentley



    Description:

    This pencil serves as a sense of scale. The black bars along its edge are each 1 cm long.



  15. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

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



    Description:

    A zoomed-in GigaPan was made of this clast: www.gigapan.com/gigapans/159468



  16. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

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



    Description:

    This pencil serves as a sense of scale. The black bars along its side are each 1 cm long.



  17. Anticline
  18. GigaPanner rig

    Snapshot Title: GigaPanner rig
    Taken by: Callan Bentley

    Image: Miette Group slate, Trans-Canada Highway and Icefields Parkway junction, Banff National Park
    Image Owner: Callan Bentley



    Description:

    The mobile GigaPanning vehicle is on the scene.



  19. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

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



    Description:

    The rock fizzes with HCl only when powdered.



  20. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

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



    Description:

    Each black bar is 1 cm long.



  21. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

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



    Description:

    The rock fizzes with HCl only when powdered.



  22. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

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



    Description:

    1-cm marks on the side.



  23. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

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



    Description:

    1 cm markings on the side.



  24. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

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



    Description:

    The rock fizzes with HCl only when powdered.



  25. Acid test

    Snapshot Title: Acid test
    Taken by: Callan Bentley

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



    Description:

    The rock fizzes with HCl only when powdered.



  26. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

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



    Description:

    A Canadian one-dollar coin, called a "loony."



  27. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Gog Formation quartzite, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Which way was the current flowing?



  28. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Gog Formation quartzite, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1 cm marks on the side.



  29. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Bedding / cleavage relationships in Chancellor Group slates, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    Differentially eroded cuspate-lobate buckle folding of sandy layers.



  30. Scale pencil

    Snapshot Title: Scale pencil
    Taken by: Callan Bentley

    Image: Bedding / cleavage relationships in Chancellor Group slates, Yoho National Park, British Columbia, Canada
    Image Owner: Callan Bentley



    Description:

    1-cm black bars on side.



  31. 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?



  32. 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.



  33. 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.



  34. 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.



  35. 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.



  36. 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?



  37. 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.



  38. Flower
  39. 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.



  40. 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.



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