1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar


Callan Bentley's Snapshots

Go to page:
  1. 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.



  2. 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



  3. 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



  4. 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



  5. 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



  6. 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.



  7. 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.



  8. 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.



  9. 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



  10. 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.



  11. 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.



  12. 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.



  13. 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!



  14. 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.



  15. 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?"



  16. Pigeon

    Snapshot Title: Pigeon
    Taken by: Callan Bentley

    Image: St Stephens Green
    Image Owner: Alan Pitts



    Description:

    .



  17. White meets orange

    Snapshot Title: White meets orange
    Taken by: Callan Bentley

    Image: Reaction rim
    Image Owner: Callan Bentley



    Description:

    Gray results.



  18. 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?



  19. 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:

    .



  20. 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?



  21. Bug

    Snapshot Title: Bug
    Taken by: Callan Bentley

    Image: Fauquier Formation Rock Wall
    Image Owner: Alan Pitts



    Description:

    Flying insect



  22. 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



  23. 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?



  24. 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?



  25. 1 cent

    Snapshot Title: 1 cent
    Taken by: Callan Bentley

    Image: Fauquier Formation Outcrop
    Image Owner: Alan Pitts



    Description:

    for scale



  26. 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?



  27. 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?



  28. 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.



  29. 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.



  30. Observers

    Snapshot Title: Observers
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    on the Virginia side.



  31. 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 ...



  32. 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?



  33. 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



  34. 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.



  35. 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.



  36. Trio

    Snapshot Title: Trio
    Taken by: Callan Bentley

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



    Description:

    magnetite porphyroblasts



  37. 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



  38. Fused grains

    Snapshot Title: Fused grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    getting all buddy-buddy with their neighbors



  39. More sutured grains

    Snapshot Title: More sutured grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    with a preferred alignment



  40. Little black grain

    Snapshot Title: Little black grain
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Interesting. Who's this little fellow?



Go to page: