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Callan Bentley's Snapshots

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  1. Plume

    Snapshot Title: Plume
    Taken by: Callan Bentley

    Image: Chapman's Mill, Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    This plumose structure shows joint propagation from right to left.



  2. Scale pencil

    Snapshot Title: Scale pencil
    Taken by: Callan Bentley

    Image: Chapman's Mill, Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Black bars are each one centimeter in length.



  3. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Calvert Formation, Scientists' Cliffs, Maryland (#3 of 8)
    Image Owner: Callan Bentley



    Description:

    Want to see a petri dish full of sand from this location in "macro" GigaPan view? Try this:
    gigapan.com/gigapans/126987



  4. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Calvert Formation, Scientists' Cliffs, Maryland (#2 of 8)
    Image Owner: Callan Bentley



    Description:

    Want to see a petri dish full of sand from this location in "macro" GigaPan view? Try this:
    gigapan.com/gigapans/126987



  5. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Calvert Formation, Scientists' Cliffs, Maryland (#8 of 8)
    Image Owner: Callan Bentley



    Description:

    Want to see a petri dish full of sand from this location in "macro" GigaPan view? Try this:
    gigapan.com/gigapans/126987



  6. Skyline Drive

    Snapshot Title: Skyline Drive
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Take this road north through Shenandoah National Park.



  7. Transport direction?

    Snapshot Title: Transport direction?
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Based on the evidence in this roadcut, if this sign were referring to the direction of transport of Blue Ridge rocks, would it be correct, off by 90 degrees, or completely opposite (off by 180 degrees...



  8. 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?



  9. Cairn

    Snapshot Title: Cairn
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Who built this? With what purpose?



  10. 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?



  11. 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!



  12. Pod

    Snapshot Title: Pod
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    of epidotized sandstone



  13. Pod

    Snapshot Title: Pod
    Taken by: Callan Bentley

    Image: Rockfish Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    of epidotized sandstone



  14. 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



  15. 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



  16. 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



  17. 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



  18. Hinge

    Snapshot Title: Hinge
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Line of maximum inflection



  19. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    2 centimeters



  20. 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)



  21. 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.



  22. Scale card

    Snapshot Title: Scale card
    Taken by: Callan Bentley

    Image: Anticline in Veach Gap
    Image Owner: Callan Bentley



    Description:

    Courtesy of DGMR.



  23. 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.



  24. 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.



  25. 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



  26. 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!



  27. 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.



  28. 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.



  29. 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...



  30. 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.



  31. 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).



  32. 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?



  33. 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.



  34. "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.



  35. 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



  36. 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



  37. 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).



  38. 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



  39. 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



  40. 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).



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