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Callan Bentley's Snapshots

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  1. 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!



  2. 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.



  3. 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.



  4. 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.



  5. 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.



  6. Stromatolites

    Snapshot Title: Stromatolites
    Taken by: Callan Bentley

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



    Description:

    Cambrian microbial mounds, fossilized.



  7. 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.



  8. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

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



    Description:

    Descending from the summit.



  9. 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.



  10. 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...



  11. 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.



  12. 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.



  13. 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).



  14. 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.



  15. 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?



  16. 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?



  17. 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.



  18. 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?



  19. 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.



  20. 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?



  21. 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.



  22. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    Between granite pegmatite and metamorphic host rocks.



  23. My dad's hand

    Snapshot Title: My dad's hand
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    Wow - I didn't notice he was in the GigaPan!



  24. bench

    Snapshot Title: bench
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    a good place for a weary geologist to rest



  25. Slickensides

    Snapshot Title: Slickensides
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    These slickensides reinforce the interpretation that this is a fault breccia rather than a sedimentary breccia.



  26. Cross-sectional view

    Snapshot Title: Cross-sectional view
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    Rotate the sample 90 degrees and take a look at the side-view, here:
    www.gigapan.com/gigapans/157860



  27. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    This bar is 1 cm long.



  28. Bottom view

    Snapshot Title: Bottom view
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    Rotate the sample 90 degrees, and take a look at the slickensides along the bottom: gigapan.com/gigapans/156561



  29. Vein calcite

    Snapshot Title: Vein calcite
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    Vein calcite that presumably sealed the fault prior to reactivation and disaggregation, and ultimately being entombed in the new breccia.



  30. Limestone clast

    Snapshot Title: Limestone clast
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    A fragment of the fault's wall rock, tumbled in the fault zone.



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fault Breccia in the Helderberg Group
    Image Owner: Robin Rohrback



    Description:

    This box is 1 centimeter long.



  32. Fold hinge

    Snapshot Title: Fold hinge
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    Fold hinge



  33. Cuspate / lobate boundaries

    Snapshot Title: Cuspate / lobate boundaries
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    felsic layers have bulbous boundaries, while the mafic layers squirt out of the way.



  34. "W"

    Snapshot Title: "W"
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    Small scale fold.



  35. Garnets

    Snapshot Title: Garnets
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    Nice round porphyroblasts



  36. Red pen

    Snapshot Title: Red pen
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    (to serve as a sense of scale)



  37. Tafoni

    Snapshot Title: Tafoni
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    Some weathering pits evident in these seaside exposures.



  38. Ptygmatic folding

    Snapshot Title: Ptygmatic folding
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    .



  39. Differential weathering

    Snapshot Title: Differential weathering
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    of folded layers with different compositions



  40. Red pen

    Snapshot Title: Red pen
    Taken by: Callan Bentley

    Image: Folded metamorphic rocks exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    (for a sense of scale)



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