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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fold
    Image Owner: Callan Bentley



    Description:

    1 cm



  2. Muscovite

    Snapshot Title: Muscovite
    Taken by: Callan Bentley

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



    Description:

    Lots of it.



  3. 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.



  4. Foliated

    Snapshot Title: Foliated
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    Mylonitized (reduced grains size and smeared out)



  5. Equigranular

    Snapshot Title: Equigranular
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    undeformed



  6. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Sheared gabbro
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



  7. 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



  8. 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



  9. 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.



  10. Birding

    Snapshot Title: Birding
    Taken by: Callan Bentley

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



    Description:

    Checking out the avian residents.



  11. 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?



  12. Snoozing bird

    Snapshot Title: Snoozing bird
    Taken by: Callan Bentley

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



    Description:

    Shhhh



  13. Weathered

    Snapshot Title: Weathered
    Taken by: Callan Bentley

    Image: Weathered and jointed ignimbrite, Grind of the Navir, Shetland
    Image Owner: Callan Bentley



    Description:

    ignimbrite is black



  14. Fresh

    Snapshot Title: Fresh
    Taken by: Callan Bentley

    Image: Weathered and jointed ignimbrite, Grind of the Navir, Shetland
    Image Owner: Callan Bentley



    Description:

    ignimbrite is pink



  15. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Weathered and jointed ignimbrite, Grind of the Navir, Shetland
    Image Owner: Callan Bentley



    Description:

    Lens cap



  16. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    At a foram from this sand sample: gigapan.com/gigapans/195395 (Scanning Electron Micrograph)



  17. pteropod shell

    Snapshot Title: pteropod shell
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    or merely a small example of a typical benthic gastropod?



  18. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    at a sea urchin spine, via the scanning electron microscope: gigapan.com/gigapans/195396



  19. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fish fossil from Green River Formation
    Image Owner: Callan Bentley



    Description:

    1 cm wide.



  20. Calculate Stretch

    Snapshot Title: Calculate Stretch
    Taken by: Callan Bentley

    Image: Boudinaged tourmalines in Setters Schist, Maryland
    Image Owner: Callan Bentley



    Description:

    compare initial to final length.



  21. Conchoidal fractures

    Snapshot Title: Conchoidal fractures
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Define this quartz sand grain.



  22. Sea urchin

    Snapshot Title: Sea urchin
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Spine



  23. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Gorgeous!



  24. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Lovely



  25. Sea urchin spines

    Snapshot Title: Sea urchin spines
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Fresh or weathered?



  26. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Sand from Playa Rocosa De Piñones, Puerto Rico
    Image Owner: Callan Bentley



    Description:

    Petri dish is 9 cm in diameter.



  27. Calculate elongation

    Snapshot Title: Calculate elongation
    Taken by: Callan Bentley

    Image: Boudinaged tourmaline in Setters Schist
    Image Owner: Callan Bentley



    Description:

    Compare original length to final length.



  28. Calculate stretch

    Snapshot Title: Calculate stretch
    Taken by: Callan Bentley

    Image: Boudinaged tourmaline in Setters Schist
    Image Owner: Callan Bentley



    Description:

    Compare the original length to the final length.



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Boudinaged tourmaline in Setters Schist
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  30. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    Porphyroblast



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    1 cm "tall" black bar.



  32. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Wrinkly crenulation folds in marble
    Image Owner: Callan Bentley



    Description:

    1 cm wide.



  33. Split

    Snapshot Title: Split
    Taken by: Callan Bentley

    Image: Wrinkly crenulation folds in marble
    Image Owner: Callan Bentley



    Description:

    What's going on here?



  34. Highly foliated texture

    Snapshot Title: Highly foliated texture
    Taken by: Callan Bentley

    Image: Shear zone in granite
    Image Owner: Callan Bentley



    Description:

    Sheared out. Note ribboned quartz with orthogonal fracturing.



  35. Typical texture

    Snapshot Title: Typical texture
    Taken by: Callan Bentley

    Image: Shear zone in granite
    Image Owner: Callan Bentley



    Description:

    Phaneritic



  36. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Shear zone in granite
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  37. Sea urchin spine

    Snapshot Title: Sea urchin spine
    Taken by: Callan Bentley

    Image: Sediment from Blackbird Caye, Turneffe Atoll, Belize
    Image Owner: Robin Rohrback



    Description:

    Fairly weathered



  38. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

    Image: Sediment from Blackbird Caye, Turneffe Atoll, Belize
    Image Owner: Robin Rohrback



    Description:

    See a scanning electron micrograph GigaPan of this little fellow here:
    gigapan.com/gigapans/195029



  39. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Crossbedded Red Sandstone with Lichen
    Image Owner: Robin Rohrback



    Description:

    Which way's up?



  40. Slabbed and polished

    Snapshot Title: Slabbed and polished
    Taken by: Callan Bentley

    Image: Crossbedded Red Sandstone with Lichen
    Image Owner: Robin Rohrback



    Description:

    compare to other



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