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Callan Bentley's Snapshots

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  1. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Is it dipping steeply? moderately? shallowly?
    In what direction?



  2. Vulture

    Snapshot Title: Vulture
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    You can count the secondaries on its wing!



  3. Pod

    Snapshot Title: Pod
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    of epidotized sandstone



  4. Pod

    Snapshot Title: Pod
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    of epidotized sandstone



  5. Sandstone

    Snapshot Title: Sandstone
    Taken by: Callan Bentley

    Image: Faulted Massanutten Formation sandstone at Blue Hole
    Image Owner: Callan Bentley



    Description:

    To view a sample of the Massanutten Sandstone in macro detail, try this:
    gigapan.com/gigapans/126687



  6. Sandstone

    Snapshot Title: Sandstone
    Taken by: Callan Bentley

    Image: Veach Gap Anticline 1
    Image Owner: Alan Pitts



    Description:

    To view a sample of the Massanutten Sandstone in macro detail, try this:
    gigapan.com/gigapans/126687



  7. Sandstone

    Snapshot Title: Sandstone
    Taken by: Callan Bentley

    Image: Veach Gap Anticline 2
    Image Owner: Alan Pitts



    Description:

    To view a sample of the Massanutten Sandstone in macro detail, try this:
    gigapan.com/gigapans/126687



  8. Sandstone

    Snapshot Title: Sandstone
    Taken by: Callan Bentley

    Image: Fort Valley from Buzzard Rocks
    Image Owner: Alan Pitts



    Description:

    To view a sample of the Massanutten Sandstone in macro detail, try this:
    gigapan.com/gigapans/126687



  9. Hinge

    Snapshot Title: Hinge
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Line of maximum inflection



  10. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    2 centimeters



  11. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Concave up (to the left)



  12. Hinge

    Snapshot Title: Hinge
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Strata dip to the left at left, and dip to the right at right.



  13. Scale card

    Snapshot Title: Scale card
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Courtesy of DGMR.



  14. 10 cm

    Snapshot Title: 10 cm
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Scale bar - the long edge of each black and white rectangle is 10 centimeters.



  15. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    inches on top, cm on bottom. Courtesy DGMR.



  16. Hackle fringe

    Snapshot Title: Hackle fringe
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Nice joint-edge filigree



  17. Massive bed

    Snapshot Title: Massive bed
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This was one big turbidite!



  18. Cleavage...

    Snapshot Title: Cleavage...
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    is close to vertical, while bedding dips moderately off to the left.



  19. Scale bar

    Snapshot Title: Scale bar
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Courtesy of the Virginia Division of Geology and Mineral Resources.



  20. Positive groove

    Snapshot Title: Positive groove
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    What is this thing? A trace fossil? Its consistent width would suggest that. A tool mark? These are turbidite strata, after all - they are deposited in deep sea environments that aren't particularly r...



  21. Tool marks

    Snapshot Title: Tool marks
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Scratch, divots, scrapes and grooves made by current-entrained debris.



  22. Tool marks

    Snapshot Title: Tool marks
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This appear to be tool marks (little gouges made by solid particles as they are dragged along by currents).



  23. Trace fossil?

    Snapshot Title: Trace fossil?
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Or tool mark?



  24. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Each vertical black and white bar is 10 cm tall.



  25. "Geology"

    Snapshot Title: "Geology"
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Center of this scale bar, courtesy of the Virginia Department of Geology and Mineral Resources.



  26. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Martinsburg Formation, Millner Road (near Deer Rapids Road), Shenandoah County, Virginia
    Image Owner: Callan Bentley



    Description:

    One of the graded beds from near this site has been imaged in macro GigaPan format. Check it out here:
    gigapan.com/gigapans/126104



  27. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Martinsburg Formation, Millner Road and Bethel Road, Shenandoah County, Virginia
    Image Owner: Callan Bentley



    Description:

    A block of rock collected at this site has been imaged in macro GigaPan format here:
    gigapan.com/gigapans/126104



  28. Cleavage and bedding

    Snapshot Title: Cleavage and bedding
    Taken by: Callan Bentley

    Image: Martinsburg Formation, Millner Road and Bethel Road, Shenandoah County, Virginia
    Image Owner: Callan Bentley



    Description:

    Cleavage dips steeply to the left (NW), while bedding dips moderately to the right (SE).



  29. Higher...

    Snapshot Title: Higher...
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    ...in the section, there is more sand and less mud. See for yourself:
    gigapan.com/gigapans/125616



  30. Lower...

    Snapshot Title: Lower...
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    ...in the section, there is less sand and more mud. See for yourself:
    gigapan.com/gigapans/125617



  31. Bedding vs. cleavage

    Snapshot Title: Bedding vs. cleavage
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    Bedding is upright (vertical bands showing different colors and textures), while cleavage dips steeply to the right (east).



  32. Bedding vs. cleavage II

    Snapshot Title: Bedding vs. cleavage II
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    Bedding upright; cleavage dipping steeply to the right (east).



  33. Spheroidal weathering

    Snapshot Title: Spheroidal weathering
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    A nice example.



  34. Joints

    Snapshot Title: Joints
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    Cutting more or less orthogonally across the sandstone bed (shale both upsection (left) and downsection (right)).



  35. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    One centimeter



  36. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    In inches and centimeters.



  37. Bedding vs. cleavage.

    Snapshot Title: Bedding vs. cleavage.
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    Bedding upright; cleavage dipping to the right.



  38. Spheroidal weathering

    Snapshot Title: Spheroidal weathering
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    A nice example.



  39. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: "Cub Sandstone" (Uppermost Martinsburg Formation), near Catherine Furnace, Virginia
    Image Owner: Callan Bentley



    Description:

    A second sense of scale.



  40. 1 cm
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