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Callan Bentley's Snapshots

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  1. PATC logo

    Snapshot Title: PATC logo
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, showing Reynolds Limestone Member
    Image Owner: Callan Bentley



    Description:

    Potomac Appalachian Trail Club sticker in the window of the GigaPanMobile.



  2. Rockfall

    Snapshot Title: Rockfall
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, showing Reynolds Limestone Member
    Image Owner: Callan Bentley



    Description:

    The biggest pieces go the furthest...



  3. Jeff & Bridget

    Snapshot Title: Jeff & Bridget
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, showing Reynolds Limestone Member
    Image Owner: Callan Bentley



    Description:

    GigaPanners in training examine the base of the Reynolds Limestone.



  4. Root traces

    Snapshot Title: Root traces
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    Reduced chemistry cross-cutting surrounding oxidized sediment.



  5. Concentric ribs

    Snapshot Title: Concentric ribs
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    Conchoidal fracture.



  6. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Georgetown Intrusive Suite, Rock Creek Park, Washington, DC
    Image Owner: Callan Bentley



    Description:

    1 cm long



  7. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Garnetiferous metagraywacke, Rock Creek Shear Zone, Washington, DC
    Image Owner: Callan Bentley



    Description:

    porphyroblast



  8. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Garnetiferous metagraywacke, Rock Creek Shear Zone, Washington, DC
    Image Owner: Callan Bentley



    Description:

    3 cm



  9. Stretched  clast

    Snapshot Title: Stretched clast
    Taken by: Callan Bentley

    Image: Stretched clasts in Laurel Formtion metagraywacke, Rock Creek Shear Zone, Washington, DC
    Image Owner: Callan Bentley



    Description:

    Axial ratio of 4 to 1?



  10. Stretched quartz clast

    Snapshot Title: Stretched quartz clast
    Taken by: Callan Bentley

    Image: Stretched clasts in Laurel Formtion metagraywacke, Rock Creek Shear Zone, Washington, DC
    Image Owner: Callan Bentley



    Description:

    One of several



  11. Scale
  12. What's this?

    Snapshot Title: What's this?
    Taken by: Callan Bentley

    Image: Klamath Basin
    Image Owner: Aaron M Barth



    Description:

    A box? A cinder block?



  13. Offset

    Snapshot Title: Offset
    Taken by: Callan Bentley

    Image: Klamath Faults 2
    Image Owner: Aaron M Barth



    Description:

    A thing of beauty!



  14. Redbud

    Snapshot Title: Redbud
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Cercus canadensis in spring bloom.



  15. Conjugate pair

    Snapshot Title: Conjugate pair
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    of joints, each oriented ~30 degrees to a presumed sigma-1 that was bedding-perpendicular.



  16. Joint set

    Snapshot Title: Joint set
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Prominent subvertical (bedding-perpendicular) joint set.



  17. Woodpecker trace

    Snapshot Title: Woodpecker trace
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    part II



  18. Woodpecker damage

    Snapshot Title: Woodpecker damage
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    to the tree



  19. Pinecones

    Snapshot Title: Pinecones
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    sans seeds



  20. Another example

    Snapshot Title: Another example
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    of convolute bedding in the sandstone.



  21. Convolute bedding

    Snapshot Title: Convolute bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Little sandy diapir - but restricted to the sand unit; not the muddy shale below: So soft sediment deformation (pre-lithification) due to density inversion immediately after deposition.



  22. Convolute bedding

    Snapshot Title: Convolute bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    within a sandy layer



  23. Convolute bedding

    Snapshot Title: Convolute bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Internal deformation (soft-sed) within a sandstone layer



  24. Cross bedding

    Snapshot Title: Cross bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    within sandy layer



  25. Climbing ripples

    Snapshot Title: Climbing ripples
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    within sandy layer



  26. Convolute bedding

    Snapshot Title: Convolute bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Internal deformation (soft sed. def.) within a sandstone layer.



  27. Convolute bedding

    Snapshot Title: Convolute bedding
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    within a sandy layer



  28. Carbonate nodule

    Snapshot Title: Carbonate nodule
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Characteristic of this horizon



  29. Carbonate nodule

    Snapshot Title: Carbonate nodule
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Characteristic of this horizon



  30. Carbonate nodule

    Snapshot Title: Carbonate nodule
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Characteristic of this horizon



  31. Carbonate nodule

    Snapshot Title: Carbonate nodule
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    Characteristic of this horizon



  32. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Millboro Formation shale, Route 33 near Brandywine, West Virginia
    Image Owner: Callan Bentley



    Description:

    to serve as a sense of scale



  33. "Like a Mongolian latrine in winter"

    Snapshot Title: "Like a Mongolian latrine in winter"
    Taken by: Callan Bentley

    Image: aden spatter cone
    Image Owner: Joshua Villalobos



    Description:

    Mafic spatter pile



  34. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Lower Martinsburg Formation outcrop at Funk Road and Route 11, south of Strasburg, Virginia
    Image Owner: Callan Bentley



    Description:

    This black/white bar combo is 10 cm long, left to right.



  35. Vein

    Snapshot Title: Vein
    Taken by: Callan Bentley

    Image: Oolitic Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    of calcite



  36. Upside down shell

    Snapshot Title: Upside down shell
    Taken by: Callan Bentley

    Image: Oolitic Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    With mud and very few ooids filling it.



  37. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Oolitic Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Scale



  38. Concentric ribs

    Snapshot Title: Concentric ribs
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing Zoophycos trace fossils
    Image Owner: Callan Bentley



    Description:

    Another example of this aspect of joint anatomy - temporary arrest lines.



  39. Concentric ribs

    Snapshot Title: Concentric ribs
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing Zoophycos trace fossils
    Image Owner: Callan Bentley



    Description:

    joint propagation signature



  40. Zoophycos

    Snapshot Title: Zoophycos
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing Zoophycos trace fossils
    Image Owner: Callan Bentley



    Description:

    Great curvy example



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