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Callan Bentley's Snapshots

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  1. Humpback

    Snapshot Title: Humpback
    Taken by: Callan Bentley

    Image: Diptera tipulidae 846a
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



  2. Gobstopper

    Snapshot Title: Gobstopper
    Taken by: Callan Bentley

    Image: Giant Ooids
    Image Owner: Robin Rohrback-Schiavone



    Description:

    or hailstone - which is the better analogue?



  3. Nice one

    Snapshot Title: Nice one
    Taken by: Callan Bentley

    Image: Giant Ooids
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Kind of oblong



  4. Concentrically zoned

    Snapshot Title: Concentrically zoned
    Taken by: Callan Bentley

    Image: Giant Ooids
    Image Owner: Robin Rohrback-Schiavone



    Description:

    These grains originated as chemical precipitatation in alkaline waters coated small original grains with subsequent calcite laminations.



  5. Window logo

    Snapshot Title: Window logo
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    Tru-Therm



  6. Chewing gum

    Snapshot Title: Chewing gum
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    blob



  7. Mylonite

    Snapshot Title: Mylonite
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    from Blue Ridge basement complex shear zone



  8. Ripple mark

    Snapshot Title: Ripple mark
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    from sandstone in the Culpeper Basin



  9. Rounded cobble

    Snapshot Title: Rounded cobble
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    From the Leesburg Conglomerate, Culpeper Triassic rift basin.



  10. Blue quartz

    Snapshot Title: Blue quartz
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    Typical of the Blue Ridge basement complex.



  11. Rusty milky quartz

    Snapshot Title: Rusty milky quartz
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    hydrothermal quartz veins from the Piedmont, weathered out.



  12. Travertine

    Snapshot Title: Travertine
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    from a stream in the Valley & Ridge



  13. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    weathered basalt from Dave Matthews' farm outside of Scottsville, Virginia.



  14. Skolithos

    Snapshot Title: Skolithos
    Taken by: Callan Bentley

    Image: The nascent NOVA Annandale rock garden, as of May 2012
    Image Owner: Callan Bentley



    Description:

    top of the trace fossil.
    Antietam Formation quartz sandstone.



  15. Avalanche detachment scarps

    Snapshot Title: Avalanche detachment scarps
    Taken by: Callan Bentley

    Image: Bow Lake, Crowfoot Mountain, Canadian Rockies
    Image Owner: Dave Belcher



    Description:

    You can see where the upper layer of snow slid off and downward.



  16. Avalanche run out

    Snapshot Title: Avalanche run out
    Taken by: Callan Bentley

    Image: Bow Lake, Crowfoot Mountain, Canadian Rockies
    Image Owner: Dave Belcher



    Description:

    Note the lack of trees in the immediate vicinity!



  17. You are here

    Snapshot Title: You are here
    Taken by: Callan Bentley

    Image: St Stephens Green
    Image Owner: Alan Pitts



    Description:

    Map of the park.



  18. This woman is clearly wondering...

    Snapshot Title: This woman is clearly wondering...
    Taken by: Callan Bentley

    Image: St Stephens Green
    Image Owner: Alan Pitts



    Description:

    ..."What is that GigaPanner GigaPanning?"



  19. Pigeon

    Snapshot Title: Pigeon
    Taken by: Callan Bentley

    Image: St Stephens Green
    Image Owner: Alan Pitts



    Description:

    .



  20. White meets orange

    Snapshot Title: White meets orange
    Taken by: Callan Bentley

    Image: Reaction rim
    Image Owner: Callan Bentley



    Description:

    Gray results.



  21. Kinematic indicator

    Snapshot Title: Kinematic indicator
    Taken by: Callan Bentley

    Image: Ferruginous Quartzite
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Can you deduce in which direction a paper towel was dragged over the rough surface of this sample?



  22. A troglodyte emerges from his cave.

    Snapshot Title: A troglodyte emerges from his cave.
    Taken by: Callan Bentley

    Image: Breccia, Titus Canyon Narrows, Death Valley NP
    Image Owner: Ron Schott



    Description:

    .



  23. Who's this fellow?

    Snapshot Title: Who's this fellow?
    Taken by: Callan Bentley

    Image: Cinder Cone Cross Section
    Image Owner: Ron Schott



    Description:

    A blue bearblob?



  24. Bug

    Snapshot Title: Bug
    Taken by: Callan Bentley

    Image: Fauquier Formation Rock Wall
    Image Owner: Alan Pitts



    Description:

    Flying insect



  25. Distant car

    Snapshot Title: Distant car
    Taken by: Callan Bentley

    Image: Fauquier Formation Rock Wall
    Image Owner: Alan Pitts



    Description:

    Station wagon or SUV, by the looks of it



  26. White stuff

    Snapshot Title: White stuff
    Taken by: Callan Bentley

    Image: Fauquier Formation Rock Wall
    Image Owner: Alan Pitts



    Description:

    Is this vein quartz, or marble from the top of the Fauquier sequence?



  27. Weathering rind?

    Snapshot Title: Weathering rind?
    Taken by: Callan Bentley

    Image: Fauquier Formation Outcrop
    Image Owner: Alan Pitts



    Description:

    Alan, is this a weathering rind?



  28. 1 cent

    Snapshot Title: 1 cent
    Taken by: Callan Bentley

    Image: Fauquier Formation Outcrop
    Image Owner: Alan Pitts



    Description:

    for scale



  29. Wild looking little orbs.

    Snapshot Title: Wild looking little orbs.
    Taken by: Callan Bentley

    Image: Snowball Earth Educational Rock Sample Suite PFH-4
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Are they slightly strained, or were they originally ellipsoidal?



  30. Funky pisolitic BIF

    Snapshot Title: Funky pisolitic BIF
    Taken by: Callan Bentley

    Image: Snowball Earth Educational Rock Sample Suite PFH-4
    Image Owner: Robin Rohrback-Schiavone



    Description:

    What's going on with these oddball odd balls?



  31. Truncation

    Snapshot Title: Truncation
    Taken by: Callan Bentley

    Image: Ghaub Formation diamictite with Snowball Earth glacial dropstones
    Image Owner: Callan Bentley



    Description:

    The dropstone pierced through this central layer, resulting in a truncating relationship between that layer and the dropstone at left.



  32. Compaction of sediments

    Snapshot Title: Compaction of sediments
    Taken by: Callan Bentley

    Image: Ghaub Formation diamictite with Snowball Earth glacial dropstones
    Image Owner: Callan Bentley



    Description:

    As the piercing dropstone impaced these fine-grained carbonate mud sediments, they squished downward and out of the way.



  33. Observers

    Snapshot Title: Observers
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    on the Virginia side.



  34. Quartz vein

    Snapshot Title: Quartz vein
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    This area hosts 2 generations of quartz veins - an older set which were folded and boudinaged during 460 Ma Taconian mountain-building, and a younger (post-Taconian) set, which are gold-bearing. This ...



  35. Cooler

    Snapshot Title: Cooler
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    Flood debris? Or is someone fishing over there?



  36. Bluish gleam

    Snapshot Title: Bluish gleam
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    a sublty blue iridescent luster



  37. Crenulations

    Snapshot Title: Crenulations
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    Slight wrinkles disrupt the plane of foliation.



  38. Purplish iridescence

    Snapshot Title: Purplish iridescence
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    A neat purple/blue sheen can be seen on some of these crystals.



  39. Trio

    Snapshot Title: Trio
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    magnetite porphyroblasts



  40. South Fork

    Snapshot Title: South Fork
    Taken by: Callan Bentley

    Image: Gooney Run Overlook, Shenandoah National Park
    Image Owner: Alan Pitts



    Description:

    of the Shenandoah River - entrenched meanders



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