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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  2. Angularity

    Snapshot Title: Angularity
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    These grains didn't get milled much before being re-cemented in place.



  3. Empty

    Snapshot Title: Empty
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    void spaces galore imply this was an implosion breccia



  4. Botryoidal habit

    Snapshot Title: Botryoidal habit
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Cryptnomelane



  5. Impinging grain boundaries

    Snapshot Title: Impinging grain boundaries
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Evidence of compaction and pressure solution prior to brecciation.



  6. Sand grain

    Snapshot Title: Sand grain
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Fairly well rounded grain in the quartzite/metaarenite of the Antietam Formation.



  7. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Brecciated Antietam Formation
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 centimeter in length.



  8. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Coal, Conemaugh Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    brittle, fine-grained stuff!



  9. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Coal, Conemaugh Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 centimeter wide.



  10. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Sandstone bed from within the Foreknobs Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



  11. P-sol

    Snapshot Title: P-sol
    Taken by: Callan Bentley

    Image: Sugarloaf Mountain Quartzite
    Image Owner: Callan Bentley



    Description:

    Embayed grain boundaries.



  12. P sol Wonderland

    Snapshot Title: P sol Wonderland
    Taken by: Callan Bentley

    Image: Conglomerate as countertop, on display in Berryville, Virginia
    Image Owner: Callan Bentley



    Description:

    A terrific suite of pressure-solution induced grain boundary contacts here.



  13. Stitching error "fault"

    Snapshot Title: Stitching error "fault"
    Taken by: Callan Bentley

    Image: Conglomerate as countertop, on display in Berryville, Virginia
    Image Owner: Callan Bentley



    Description:

    Oops



  14. Pressure solution

    Snapshot Title: Pressure solution
    Taken by: Callan Bentley

    Image: Conglomerate as countertop, on display in Berryville, Virginia
    Image Owner: Callan Bentley



    Description:

    Check out the grain boundaries - flush, embayed.



  15. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Conglomerate as countertop, on display in Berryville, Virginia
    Image Owner: Callan Bentley



    Description:

    Lens cap



  16. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    Porphyroblast



  17. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide/long.



  18. Scale label

    Snapshot Title: Scale label
    Taken by: Callan Bentley

    Image: L-tectonite, side view
    Image Owner: Callan Bentley



    Description:

    Hidden amongst the pixels.



  19. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Ronasvoe beach gravel
    Image Owner: Callan Bentley



    Description:

    Lens cap



  20. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

    Image: Ronasvoe and Ronas Hill, Shetland
    Image Owner: Callan Bentley



    Description:

    There are foraminiferida floating in these waters. Check one out here: gigapan.com/gigapans/196832



  21. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Sediment from Ronasvoe, Shetland, Scotland
    Image Owner: Robin Rohrback



    Description:

    Here's an SEM image of a foram from this sediment sample.



  22. 1 cm tall

    Snapshot Title: 1 cm tall
    Taken by: Callan Bentley

    Image: Curly graptolites
    Image Owner: Callan Bentley



    Description:

    To give you a sense of scale.



  23. Boudin neck

    Snapshot Title: Boudin neck
    Taken by: Callan Bentley

    Image: S-C mylonite
    Image Owner: Callan Bentley



    Description:

    Incipient boudinage on a small scale.



  24. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: S-C mylonite
    Image Owner: Callan Bentley



    Description:

    This is a sense of scale.



  25. The Grind

    Snapshot Title: The Grind
    Taken by: Callan Bentley

    Image: Grind of the Navir
    Image Owner: Callan Bentley



    Description:

    "Gateway of the Borer"



  26. Storm beach

    Snapshot Title: Storm beach
    Taken by: Callan Bentley

    Image: Grind of the Navir
    Image Owner: Callan Bentley



    Description:

    Boulder deposit from storm waves - 15 m above sea level.



  27. Allen Fraser

    Snapshot Title: Allen Fraser
    Taken by: Callan Bentley

    Image: Grind of the Navir
    Image Owner: Callan Bentley



    Description:

    of Shetland GeoTours



  28. GigaPan at work

    Snapshot Title: GigaPan at work
    Taken by: Callan Bentley

    Image: Grind of the Navir
    Image Owner: Callan Bentley



    Description:

    The robot is making a GigaPan of this slab: www.gigapan.com/gigapans/188903



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fold
    Image Owner: Callan Bentley



    Description:

    1 cm



  30. Muscovite

    Snapshot Title: Muscovite
    Taken by: Callan Bentley

    Image: Boudinaged torumaline from the Setters Schist, Maryland
    Image Owner: Callan Bentley



    Description:

    Lots of it.



  31. Quantify stretch

    Snapshot Title: Quantify stretch
    Taken by: Callan Bentley

    Image: Boudinaged torumaline from the Setters Schist, Maryland
    Image Owner: Callan Bentley



    Description:

    and elongation by comparing the original length to the final length. Is this technique liable to over- or under-estimate strain? Explain.



  32. Foliated

    Snapshot Title: Foliated
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    Mylonitized (reduced grains size and smeared out)



  33. Equigranular

    Snapshot Title: Equigranular
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    undeformed



  34. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



  35. Gravel

    Snapshot Title: Gravel
    Taken by: Callan Bentley

    Image: Ronasvoe and Ronas Hill, Shetland
    Image Owner: Callan Bentley



    Description:

    Check out some of this gravel here: gigapan.com/gigapans/195445



  36. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Ronasvoe and Ronas Hill, Shetland
    Image Owner: Callan Bentley



    Description:

    Check it out here: a GIGAmacro of a Petri dish full of it: gigapan.com/gigapans/189896



  37. Parking near this building

    Snapshot Title: Parking near this building
    Taken by: Callan Bentley

    Image: Lake strata, Yesnaby Coast, Orkney
    Image Owner: Callan Bentley



    Description:

    Just over the lip of the hill.



  38. Birding

    Snapshot Title: Birding
    Taken by: Callan Bentley

    Image: Lake strata, Yesnaby Coast, Orkney
    Image Owner: Callan Bentley



    Description:

    Checking out the avian residents.



  39. Contemplating the geology?

    Snapshot Title: Contemplating the geology?
    Taken by: Callan Bentley

    Image: Lake strata, Yesnaby Coast, Orkney
    Image Owner: Callan Bentley



    Description:

    Or something else worth paying attention to?



  40. Snoozing bird

    Snapshot Title: Snoozing bird
    Taken by: Callan Bentley

    Image: Lake strata, Yesnaby Coast, Orkney
    Image Owner: Callan Bentley



    Description:

    Shhhh



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