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Callan Bentley's Snapshots

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  1. Trilobite glabella?

    Snapshot Title: Trilobite glabella?
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Upside-down trilobite "nose"?



  2. Trilobite segment

    Snapshot Title: Trilobite segment
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    This appears to be segment from the thorax of a trilobite ("rachis" + "pleura"??)



  3. Crinoid columnal and branching bryozoan

    Snapshot Title: Crinoid columnal and branching bryozoan
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Great detail - so small!



  4. Black thing

    Snapshot Title: Black thing
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Any idea what this is?



  5. Massanutten Synclinorium

    Snapshot Title: Massanutten Synclinorium
    Taken by: Callan Bentley

    Image: A Tapestry of Time and Terrain
    Image Owner: Ron Schott



    Description:

    Purple blob is the surface expression of Silurian and Devonian sedimentary units, warped (along with surrounding pink-coded Cambrian and Ordovician units) into a large down-turned fold.



  6. Angular unconformity

    Snapshot Title: Angular unconformity
    Taken by: Callan Bentley

    Image: Grand Canyon from Lipan Point
    Image Owner: Richard Bahr



    Description:

    The signature of missing time.



  7. Angular grain

    Snapshot Title: Angular grain
    Taken by: Callan Bentley

    Image: Sand from Al Madam, Sharjah, UAE
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Looks like some proximal provenance as well as the distal source that produced the (now) rounded grains.



  8. Perfect sphere

    Snapshot Title: Perfect sphere
    Taken by: Callan Bentley

    Image: Sand from Al Madam, Sharjah, UAE
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Wow. That's rounding.



  9. Lithic clast?

    Snapshot Title: Lithic clast?
    Taken by: Callan Bentley

    Image: Volcaniclastic Breccia from Mount St. Helens
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Set amid the porph. ~andesite?



  10. Angular clasts

    Snapshot Title: Angular clasts
    Taken by: Callan Bentley

    Image: Volcaniclastic Breccia from Mount St. Helens
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Hence: it's a breccia.



  11. Agate

    Snapshot Title: Agate
    Taken by: Callan Bentley

    Image: Volcaniclastic Breccia from Mount St. Helens
    Image Owner: Robin Rohrback-Schiavone



    Description:

    precipitated in void spaces & lithifying the igneous clasts together into a breccia.



  12. Reaction rim?

    Snapshot Title: Reaction rim?
    Taken by: Callan Bentley

    Image: Volcaniclastic Breccia from Mount St. Helens
    Image Owner: Robin Rohrback-Schiavone



    Description:

    This phenocryst seems to have triggered a reaction in the surrounding groundmass.



  13. Texture

    Snapshot Title: Texture
    Taken by: Callan Bentley

    Image: BGT amphibolite
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



  14. Suet cage

    Snapshot Title: Suet cage
    Taken by: Callan Bentley

    Image: Snowy front yard, early Christmas morning 2012
    Image Owner: Callan Bentley



    Description:

    for the birdies, none of whom deigned to show up for this shoot.



  15. Suet cage

    Snapshot Title: Suet cage
    Taken by: Callan Bentley

    Image: Snowy front yard, early Christmas morning 2012
    Image Owner: Callan Bentley



    Description:

    for the birdies, none of whom deigned to show up for this shoot.



  16. Anticline

    Snapshot Title: Anticline
    Taken by: Callan Bentley

    Image: Anticline in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    Note also the well-developed cleavage in the clay-rich beds.



  17. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Anticline in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1cm in length.



  18. Even the trees appear folded!

    Snapshot Title: Even the trees appear folded!
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    Heh heh.



  19. Orange flag

    Snapshot Title: Orange flag
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    .



  20. Syncline

    Snapshot Title: Syncline
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    with kind of a flat bottom.



  21. Anticline with strongly-cleaved beds.

    Snapshot Title: Anticline with strongly-cleaved beds.
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    .



  22. Anticline

    Snapshot Title: Anticline
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    Also note the axial plane cleavage.



  23. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Folds in Edinburg Formation, Opequon Creek, Clarke County, Virginia
    Image Owner: Callan Bentley



    Description:

    black bars measure 1 cm each



  24. Leucosome

    Snapshot Title: Leucosome
    Taken by: Callan Bentley

    Image: Migmatite on the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Little blobs of granite that "sweated out" of the metagraywacke source rock.



  25. Joints parallel to dikes

    Snapshot Title: Joints parallel to dikes
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes on the Virginia Side, Visible From the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Clearly, the crust here had cooled off significantly between 460 Ma (during the Taconian Orogeny, when the metagraywacke of the Mather Gorge Formation was folded, boudinaged, and partially melted) and...



  26. Blocky weathering

    Snapshot Title: Blocky weathering
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes on the Virginia Side, Visible From the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    A different weathering pattern (and more rapid weathering, resulting in a recessed outcrop expression) typifies the lamprophyre which cuts across metagraywacke of the Mather Gorge Formation at this lo...



  27. Dark miniature

    Snapshot Title: Dark miniature
    Taken by: Callan Bentley

    Image: Lady Cave Anticline
    Image Owner: Ian Stimpson



    Description:

    Same shape, but looks like shale in the interior of this structure.



  28. Joint parallel to dikes

    Snapshot Title: Joint parallel to dikes
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes on the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    The crust here behaved in a brittle fashion by 360 Ma.



  29. Lamprophyre

    Snapshot Title: Lamprophyre
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes on the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Fresh surface



  30. Eugene the yeastly beastie

    Snapshot Title: Eugene the yeastly beastie
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes on the Billy Goat Trail
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



  31. Sacrilege

    Snapshot Title: Sacrilege
    Taken by: Callan Bentley

    Image: Devil's Racecourse
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Nasty habit.



  32. Eugene the Yeastie!

    Snapshot Title: Eugene the Yeastie!
    Taken by: Callan Bentley

    Image: Devil's Racecourse
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Chilling out with similiarly-colored, similarly-shaped, dissimilarly-sized bretheren.



  33. Measure apparent dip

    Snapshot Title: Measure apparent dip
    Taken by: Callan Bentley

    Image: Massanutten Sandstone exposed at Red Hole on Passage Creek
    Image Owner: Callan Bentley



    Description:

    Just put your protractor on the computer screen!



  34. "Red Hole"

    Snapshot Title: "Red Hole"
    Taken by: Callan Bentley

    Image: Massanutten Sandstone exposed at Red Hole on Passage Creek
    Image Owner: Callan Bentley



    Description:

    grafitto



  35. Red, white, and blue

    Snapshot Title: Red, white, and blue
    Taken by: Callan Bentley

    Image: Martinsburg Formation at Guard Hill, north of Front Royal, Virginia
    Image Owner: Callan Bentley



    Description:

    American flag atop the hill. There was a Romney/Ryan sign here ten days earlier.



  36. Ack.

    Snapshot Title: Ack.
    Taken by: Callan Bentley

    Image: Martinsburg Formation at Guard Hill, north of Front Royal, Virginia
    Image Owner: Callan Bentley



    Description:

    Distracted by feeding my infant son whilst GigaPanning, I failed to catch this one...



  37. Bedding

    Snapshot Title: Bedding
    Taken by: Callan Bentley

    Image: Martinsburg Formation at Guard Hill, north of Front Royal, Virginia
    Image Owner: Callan Bentley



    Description:

    in Ordovician flysch - turbidites shed off the Taconian Orogen to the east.



  38. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Massanutten Sandstone exposed on Fort Valley Road
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with cm-scale demarcations.



  39. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation at Guard Hill, north of Front Royal, Virginia
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with cm demarcations.



  40. Folds?

    Snapshot Title: Folds?
    Taken by: Callan Bentley

    Image: profil
    Image Owner: Blaž Vičič



    Description:

    Are these fold hinges?



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