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Callan Bentley's Snapshots

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  1. Explanation

    Snapshot Title: Explanation
    Taken by: Callan Bentley

    Image: The Clydesdale Fault, D.C.
    Image Owner: Callan Bentley



    Description:

    This diagram shows the rock units offset along this fault in cartoon form.



  2. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Indiana limestone at the Duke Ellington Bridge, D.C.
    Image Owner: Callan Bentley



    Description:

    between weathered and washed limestone



  3. Bioturbation

    Snapshot Title: Bioturbation
    Taken by: Callan Bentley

    Image: Indiana limestone at the Duke Ellington Bridge, D.C.
    Image Owner: Callan Bentley



    Description:

    in skeletal limestone



  4. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Indiana limestone at the Duke Ellington Bridge, D.C.
    Image Owner: Callan Bentley



    Description:

    Pencil, with centimeters marked along the side.



  5. Glad for his windbreaker

    Snapshot Title: Glad for his windbreaker
    Taken by: Callan Bentley

    Image: Smithsonian Castle, Washington, DC
    Image Owner: Callan Bentley



    Description:

    It was blustery out that day.



  6. Xenolith

    Snapshot Title: Xenolith
    Taken by: Callan Bentley

    Image: Granite slab, Haupt Gardens, Smithsonian Instituion, Washington, DC
    Image Owner: Callan Bentley



    Description:

    mantled by K-spar



  7. American flag

    Snapshot Title: American flag
    Taken by: Callan Bentley

    Image: Smithsonian Castle, Washington, DC
    Image Owner: Callan Bentley



    Description:

    Blowing in the wind



  8. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Granite slab, Haupt Gardens, Smithsonian Instituion, Washington, DC
    Image Owner: Callan Bentley



    Description:

    on a potassium feldspar crystal - catching the sunlight at just the right angle.



  9. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Granite slab, Haupt Gardens, Smithsonian Instituion, Washington, DC
    Image Owner: Callan Bentley



    Description:

    cm-demarcated pencil



  10. Porcupine

    Snapshot Title: Porcupine
    Taken by: Callan Bentley

    Image: Monkeypuzzle tree, Haupt Gardens, Smithsonian Castle, Washington, DC
    Image Owner: Callan Bentley



    Description:

    Pretty much: you wouldn't want to rub the tip of this branch against your cheek.



  11. It's a puzzle for a monkey

    Snapshot Title: It's a puzzle for a monkey
    Taken by: Callan Bentley

    Image: Monkeypuzzle tree, Haupt Gardens, Smithsonian Castle, Washington, DC
    Image Owner: Callan Bentley



    Description:

    to figure out how to climb such a spiky tree.



  12. Little Adirondack chair

    Snapshot Title: Little Adirondack chair
    Taken by: Callan Bentley

    Image: Front Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    Baxter sized!



  13. Junco

    Snapshot Title: Junco
    Taken by: Callan Bentley

    Image: Front Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    in the tree



  14. Goldfinch

    Snapshot Title: Goldfinch
    Taken by: Callan Bentley

    Image: Front Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    in the tree



  15. Tufted titmouse

    Snapshot Title: Tufted titmouse
    Taken by: Callan Bentley

    Image: Front Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    on suet



  16. Goldfinch

    Snapshot Title: Goldfinch
    Taken by: Callan Bentley

    Image: Front Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    in subdued winter plumage



  17. Name of the GigaPanner

    Snapshot Title: Name of the GigaPanner
    Taken by: Callan Bentley

    Image: Side Yard, February 8, 2013
    Image Owner: Callan Bentley



    Description:

    and where he takes his car.



  18. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: LIDAR Weverton Formation - Blue Ridge front, Virginia with geologic map overlay
    Image Owner: Callan Bentley



    Description:

    with apparent left-lateral offset.



  19. Lovely folds

    Snapshot Title: Lovely folds
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Hinge thickened relative to thinned limbs.



  20. Folded quartz vein?

    Snapshot Title: Folded quartz vein?
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    (stained by iron oxides)



  21. Lovely folds

    Snapshot Title: Lovely folds
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    A few cm across.



  22. A relatively clean look

    Snapshot Title: A relatively clean look
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    At small-scale folding. This texture makes me think of the migmatite far downstream at the Billy Goat Trail.



  23. Scale 2

    Snapshot Title: Scale 2
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Rite in the Rain photo focus card.



  24. Typical looking Catoctin

    Snapshot Title: Typical looking Catoctin
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Foliated greenstone.



  25. Typical looking Catoctin

    Snapshot Title: Typical looking Catoctin
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Foliated greenstone.



  26. Scale 1

    Snapshot Title: Scale 1
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Swiss army knife.



  27. Harmonic crenulations

    Snapshot Title: Harmonic crenulations
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Very regular pattern of folding.



  28. Small scale folds

    Snapshot Title: Small scale folds
    Taken by: Callan Bentley

    Image: Fascinating Folded Float under Route 15 Bridge at Point of Rocks
    Image Owner: Chris Johnson



    Description:

    Clear layering present.



  29. Folds in the Weverton Formation

    Snapshot Title: Folds in the Weverton Formation
    Taken by: Callan Bentley

    Image: LIDAR Weverton Formation - Blue Ridge front, Virginia with geologic map overlay
    Image Owner: Callan Bentley



    Description:

    Well mapped in 1974 by Gathright and Nystrom, confirmed in 2013 by LiDAR.



  30. Small-scale folds

    Snapshot Title: Small-scale folds
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Deforming foliation in the Catoctin formation greenstone.



  31. Epidote pods

    Snapshot Title: Epidote pods
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Granny Smith apple green!



  32. Black vulture?

    Snapshot Title: Black vulture?
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    The white patch on the underside of the far wing suggests this is a black vulture caught in mid-flap.



  33. Route 15

    Snapshot Title: Route 15
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    This bridge takes Route 15 over the Potomac River in the stretch between Frederick, Maryland, and Leesburg, Virginia.



  34. Turkey vulture

    Snapshot Title: Turkey vulture
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    A common bird to see gliding along in this region.



  35. More detail

    Snapshot Title: More detail
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    This area is also covered (at closer range, with fewer trees) in another GigaPan:
    gigapan.com/gigapans/122629



  36. Fluids flowing...

    Snapshot Title: Fluids flowing...
    Taken by: Callan Bentley

    Image: Boxwork on Sandstone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    ...through an orthogonal set of cracks permeated into the surrounding sandstone, making it tougher than non-fluid-soaked sandstone. Later, weathering etched out the primary sandstone, but had a harder...



  37. Grallator

    Snapshot Title: Grallator
    Taken by: Callan Bentley

    Image: Therapod Tracks 2
    Image Owner: Alan Pitts



    Description:

    Three toes with pointy tips



  38. Recumbent antiforms and synform

    Snapshot Title: Recumbent antiforms and synform
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Or is it synforms and antiforms?
    ...Depends on which way it got turned over. Based on the westward vergence of the rest of the structures here, I'm guessing 2 antiforms and a central synform.



  39. Squirrel nest??

    Snapshot Title: Squirrel nest??
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    I've never known squirrels to nest on cliffs rather than trees, but this looks like one of their leaf nests.



  40. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    of a quartz vein



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