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Callan Bentley's Snapshots

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  1. "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...



  2. 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.



  3. 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).



  4. 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.



  5. 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.



  6. "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.



  7. Teleprompters

    Snapshot Title: Teleprompters
    Taken by: Callan Bentley

    Image: Republican National Convention Keynote
    Image Owner: gigapanturner



    Description:

    Just sayin'.



  8. Hole

    Snapshot Title: Hole
    Taken by: Callan Bentley

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



    Description:

    viewed obliquely



  9. 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



  10. 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!



  11. 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



  12. 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



  13. 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



  14. 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.



  15. 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



  16. 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.



  17. 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



  18. 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



  19. 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.



  20. 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.



  21. 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.



  22. 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?



  23. 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.



  24. 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.



  25. Seeps

    Snapshot Title: Seeps
    Taken by: Callan Bentley

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



    Description:

    Water trickling down the surface



  26. 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.



  27. Keystone

    Snapshot Title: Keystone
    Taken by: Callan Bentley

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



    Description:

    Ceremoniously extra large



  28. 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:

    .



  29. 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?



  30. 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... ?



  31. Esker?

    Snapshot Title: Esker?
    Taken by: Callan Bentley

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



    Description:

    Is this an esker?



  32. Harpers Hollow Ln

    Snapshot Title: Harpers Hollow Ln
    Taken by: Callan Bentley

    Image: Rt 50 Cut, Mt Pleasant Syncline East limb lower section
    Image Owner: Alan Pitts



    Description:

    sign



  33. Are these...

    Snapshot Title: Are these...
    Taken by: Callan Bentley

    Image: Rt 50 Cut, Mt Pleasant Syncline East limb lower section
    Image Owner: Alan Pitts



    Description:

    ...bedforms of some sort?



  34. Jacob's staff

    Snapshot Title: Jacob's staff
    Taken by: Callan Bentley

    Image: Rt 50 Cut, Mt Pleasant Syncline East limb lower section
    Image Owner: Alan Pitts



    Description:

    1.5 m in length. Red/white bands are in 10 cm increments.



  35. Visitors

    Snapshot Title: Visitors
    Taken by: Callan Bentley

    Image: Great Falls of the Potomac
    Image Owner: Lou Bock



    Description:

    on the Maryland side of the River.



  36. Great blue heron

    Snapshot Title: Great blue heron
    Taken by: Callan Bentley

    Image: Great Falls of the Potomac
    Image Owner: Lou Bock



    Description:

    Stalking fish below the Falls.



  37. Ghost rider

    Snapshot Title: Ghost rider
    Taken by: Callan Bentley

    Image: The Leesburg Conglomerate at Ida Lee Park
    Image Owner: Chris Johnson



    Description:

    Hipster edition



  38. Nearby intersection

    Snapshot Title: Nearby intersection
    Taken by: Callan Bentley

    Image: The Leesburg Conglomerate at Ida Lee Park
    Image Owner: Chris Johnson



    Description:

    Helps find the location of the outcrop...



  39. Rite in the Rain logo

    Snapshot Title: Rite in the Rain logo
    Taken by: Callan Bentley

    Image: The Leesburg Conglomerate at Ida Lee Park
    Image Owner: Chris Johnson



    Description:

    Good detail!



  40. Cobble

    Snapshot Title: Cobble
    Taken by: Callan Bentley

    Image: The Leesburg Conglomerate at Ida Lee Park
    Image Owner: Chris Johnson



    Description:

    .



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