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Callan Bentley's Snapshots

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  1. 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



  2. 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



  3. 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.



  4. 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



  5. 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.



  6. 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



  7. 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



  8. 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.



  9. 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.



  10. 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.



  11. 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?



  12. 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.



  13. 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.



  14. Seeps

    Snapshot Title: Seeps
    Taken by: Callan Bentley

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



    Description:

    Water trickling down the surface



  15. 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.



  16. Keystone

    Snapshot Title: Keystone
    Taken by: Callan Bentley

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



    Description:

    Ceremoniously extra large



  17. 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:

    .



  18. 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?



  19. 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... ?



  20. Esker?

    Snapshot Title: Esker?
    Taken by: Callan Bentley

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



    Description:

    Is this an esker?



  21. 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



  22. 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?



  23. 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.



  24. 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.



  25. 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.



  26. 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



  27. 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...



  28. 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!



  29. Cobble

    Snapshot Title: Cobble
    Taken by: Callan Bentley

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



    Description:

    .



  30. Sad little back-eyed Susan

    Snapshot Title: Sad little back-eyed Susan
    Taken by: Callan Bentley

    Image: Front yard, August 2012
    Image Owner: Callan Bentley



    Description:

    nibbled by grasshoppers



  31. Knot

    Snapshot Title: Knot
    Taken by: Callan Bentley

    Image: Front yard, August 2012
    Image Owner: Callan Bentley



    Description:

    Or is it not?



  32. Shotgun blast

    Snapshot Title: Shotgun blast
    Taken by: Callan Bentley

    Image: Front yard, August 2012
    Image Owner: Callan Bentley



    Description:

    Thanks to the previous owners



  33. "Flowers" on hummingbird feeder

    Snapshot Title: "Flowers" on hummingbird feeder
    Taken by: Callan Bentley

    Image: Front yard, August 2012
    Image Owner: Callan Bentley



    Description:

    1" diameter apiece



  34. Firewood

    Snapshot Title: Firewood
    Taken by: Callan Bentley

    Image: Side yard, August 2012
    Image Owner: Callan Bentley



    Description:

    Gonna reverse me some photosynthesis this winter!



  35. CALLAN

    Snapshot Title: CALLAN
    Taken by: Callan Bentley

    Image: Side yard, August 2012
    Image Owner: Callan Bentley



    Description:

    The license plate



  36. Nice hackles

    Snapshot Title: Nice hackles
    Taken by: Callan Bentley

    Image: Soft sediment deformation in Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    flaring out at the edge of a joint (rusty)



  37. Joints

    Snapshot Title: Joints
    Taken by: Callan Bentley

    Image: Soft sediment deformation in Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    Vertically oriented



  38. Sand body pinches out

    Snapshot Title: Sand body pinches out
    Taken by: Callan Bentley

    Image: Hampshire Formation redbeds, from a higher perspective
    Image Owner: Callan Bentley



    Description:

    to the west, swells in thickness as you trace it out to the east.



  39. Hackle fringe!

    Snapshot Title: Hackle fringe!
    Taken by: Callan Bentley

    Image: Hampshire Formation redbeds, from a higher perspective
    Image Owner: Callan Bentley



    Description:

    Edge of a fracture



  40. Small fault?

    Snapshot Title: Small fault?
    Taken by: Callan Bentley

    Image: Hampshire Formation redbeds, from a higher perspective
    Image Owner: Callan Bentley



    Description:

    Apparently, there's a small thrust here, displacing east (left) over west (right).



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