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Callan Bentley's Snapshots

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  1. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Slab of Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    ...to provide a sense of scale.



  2. Lens cap

    Snapshot Title: Lens cap
    Taken by: Callan Bentley

    Image: Slab of Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    to provide a sense of scale, distorted though it may be. Diameter = 62 mm.



  3. Tilted beds of Massanutten Sandstone

    Snapshot Title: Tilted beds of Massanutten Sandstone
    Taken by: Callan Bentley

    Image: Blue Hole, Passage Creek, George Washington National Forest, Virginia
    Image Owner: Callan Bentley



    Description:

    You're looking along strike in this snapshot. What would you estimate the dip to be?



  4. Knot

    Snapshot Title: Knot
    Taken by: Callan Bentley

    Image: Blue Hole, Passage Creek, George Washington National Forest, Virginia
    Image Owner: Callan Bentley



    Description:

    in the ropeswing rope.



  5. Limestone block

    Snapshot Title: Limestone block
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#1 of 2)
    Image Owner: Callan Bentley



    Description:

    presumably from the Shenandoah Valley. (road fill)



  6. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Blue Hole, Passage Creek, George Washington National Forest, Virginia
    Image Owner: Callan Bentley



    Description:

    ...to provide a sense of scale.



  7. Signature of an evolving technique

    Snapshot Title: Signature of an evolving technique
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#2 of 2)
    Image Owner: Callan Bentley



    Description:

    Can you tell which columns I shot with a fixed focal distance, and which ones had auto-focus on?



  8. Sandstone beds are dipping

    Snapshot Title: Sandstone beds are dipping
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#1 of 2)
    Image Owner: Callan Bentley



    Description:

    Why are they at an angle here, rather than horizontal?



  9. White car

    Snapshot Title: White car
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#1 of 2)
    Image Owner: Callan Bentley



    Description:

    Traveling southbound on the Fort Valley Road.

    Neither complete nor in focus, however.



  10. "Red Hole" sign

    Snapshot Title: "Red Hole" sign
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#1 of 2)
    Image Owner: Callan Bentley



    Description:

    Some thoughtful vandal decided to let you know where you are...



  11. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#1 of 2)
    Image Owner: Callan Bentley



    Description:

    ...to convey a sense of scale.



  12. Fill

    Snapshot Title: Fill
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#2 of 2)
    Image Owner: Callan Bentley



    Description:

    Limestone (from the Shenandoah Valley) used to support the Fort Valley Road (flat surface at top).



  13. Ripple marks

    Snapshot Title: Ripple marks
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#2 of 2)
    Image Owner: Callan Bentley



    Description:

    Preserved in 3D on the upper surface of the thick "Red Hole" labeled bed, and as an undulating lower surface to the overlying (medium-thickness) bed.



  14. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#2 of 2)
    Image Owner: Callan Bentley



    Description:

    ...to convey a sense of scale.



  15. "Red Hole" graffiti

    Snapshot Title: "Red Hole" graffiti
    Taken by: Callan Bentley

    Image: Red Hole, Passage Creek, George Washington National Forest, Virginia (#2 of 2)
    Image Owner: Callan Bentley



    Description:

    Some fool painted the rock, but at least the identity of the place is clear.



  16. Teleprompters

    Snapshot Title: Teleprompters
    Taken by: Callan Bentley

    Image: Republican National Convention Keynote
    Image Owner: gigapanturner



    Description:

    Just sayin'.



  17. Hole

    Snapshot Title: Hole
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    viewed obliquely



  18. Slicks overprinted by...

    Snapshot Title: Slicks overprinted by...
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    ... thoughtless grafitti



  19. Slug / snail feeding traces

    Snapshot Title: Slug / snail feeding traces
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Mark of the radula!



  20. Ripple marks

    Snapshot Title: Ripple marks
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Residual primary structures resulting from current flow



  21. Square-topped pins

    Snapshot Title: Square-topped pins
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Same as others, just neater looking



  22. Pins

    Snapshot Title: Pins
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    to hold slabs of rock in place



  23. Slickensides

    Snapshot Title: Slickensides
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Grinding of one rock slab against its neighbor produces these fine lines.



  24. Lens cap for scale

    Snapshot Title: Lens cap for scale
    Taken by: Callan Bentley

    Image: Slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Diameter = 63 mm



  25. Slicks highlighted by mildew

    Snapshot Title: Slicks highlighted by mildew
    Taken by: Callan Bentley

    Image: Slickensides on slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Ew.



  26. Overlapping "leaves" of

    Snapshot Title: Overlapping "leaves" of
    Taken by: Callan Bentley

    Image: Slickensides on slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    crystal fiber lineations



  27. Lens cap for scale

    Snapshot Title: Lens cap for scale
    Taken by: Callan Bentley

    Image: Slickensides on slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    63 mm diameter



  28. Slickensides

    Snapshot Title: Slickensides
    Taken by: Callan Bentley

    Image: Slickensides on slabs of Brallier Formation shale, Paw Paw Tunnel
    Image Owner: Callan Bentley



    Description:

    Note the steps on these crystal fiber lineations: they indicate that the slab of rock seen here had another slab (since pulled away) moving up relative to it.



  29. Disembodied torso

    Snapshot Title: Disembodied torso
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, upstream exit
    Image Owner: Callan Bentley



    Description:

    of a very nice reading instructor from Montgomery College.



  30. Park ranger

    Snapshot Title: Park ranger
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, upstream exit
    Image Owner: Callan Bentley



    Description:

    The Smokey Bear hat gives it away.



  31. What do these guys see?

    Snapshot Title: What do these guys see?
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, upstream exit
    Image Owner: Callan Bentley



    Description:

    A salamander, perhaps?



  32. Ripple marks

    Snapshot Title: Ripple marks
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, upstream exit
    Image Owner: Callan Bentley



    Description:

    Primary bedding features are visible on this dipping slab of Brallier Formation shale.



  33. 6 million bricks

    Snapshot Title: 6 million bricks
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, downstream exit
    Image Owner: Callan Bentley



    Description:

    That's how many line the walls of this tunnel. It's 3/5 of a mile long.



  34. Seeps

    Snapshot Title: Seeps
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, downstream exit
    Image Owner: Callan Bentley



    Description:

    Water trickling down the surface



  35. Steps

    Snapshot Title: Steps
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, downstream exit
    Image Owner: Callan Bentley



    Description:

    There are functional stairs on either side of the tunnel entrance.



  36. Keystone

    Snapshot Title: Keystone
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, downstream exit
    Image Owner: Callan Bentley



    Description:

    Ceremoniously extra large



  37. Crest of the anticline

    Snapshot Title: Crest of the anticline
    Taken by: Callan Bentley

    Image: Paw Paw Tunnel, downstream exit
    Image Owner: Callan Bentley



    Description:

    .



  38. Swiss cheese

    Snapshot Title: Swiss cheese
    Taken by: Callan Bentley

    Image: Topographic structures of Pyhäselkä area
    Image Owner: Jouko Vanne



    Description:

    What's going on here?



  39. Striations?

    Snapshot Title: Striations?
    Taken by: Callan Bentley

    Image: Topographic structures of Pyhäselkä area
    Image Owner: Jouko Vanne



    Description:

    Large scale glacial striations, I presume... ?



  40. Esker?

    Snapshot Title: Esker?
    Taken by: Callan Bentley

    Image: Topographic structures of Pyhäselkä area
    Image Owner: Jouko Vanne



    Description:

    Is this an esker?



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