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Callan Bentley's Snapshots

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  1. 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



  2. 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



  3. 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)



  4. 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?



  5. 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



  6. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    1 cm wide.



  7. 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.



  8. 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.



  9. 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



  10. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

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



    Description:

    Gorgeous!



  11. Foram

    Snapshot Title: Foram
    Taken by: Callan Bentley

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



    Description:

    Lovely



  12. 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?



  13. 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.



  14. 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.



  15. 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.



  16. 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.



  17. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    Porphyroblast



  18. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Garnet schist
    Image Owner: Callan Bentley



    Description:

    1 cm "tall" black bar.



  19. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    1 cm wide.



  20. Split

    Snapshot Title: Split
    Taken by: Callan Bentley

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



    Description:

    What's going on here?



  21. 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.



  22. Typical texture

    Snapshot Title: Typical texture
    Taken by: Callan Bentley

    Image: Shear zone in granite
    Image Owner: Callan Bentley



    Description:

    Phaneritic



  23. 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.



  24. 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



  25. 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



  26. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

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



    Description:

    Which way's up?



  27. 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



  28. Weathered exterior

    Snapshot Title: Weathered exterior
    Taken by: Callan Bentley

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



    Description:

    compare to other



  29. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

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



    Description:

    Which way's up?



  30. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pseudotachylyte
    Image Owner: Callan Bentley



    Description:

    This blue box is 1 cm wide.



  31. Hidden message

    Snapshot Title: Hidden message
    Taken by: Callan Bentley

    Image: Granite
    Image Owner: Callan Bentley



    Description:

    About the scale.



  32. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Granite
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm "tall."



  33. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Shear zone in gabbro
    Image Owner: Callan Bentley



    Description:

    1 cm "tall" black bar



  34. Pentameral symmetry

    Snapshot Title: Pentameral symmetry
    Taken by: Callan Bentley

    Image: Crinoid columnal horizon
    Image Owner: Callan Bentley



    Description:

    Nice view of a five-pointed 'star' hollow in the center of the columnal.



  35. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Crinoid columnal horizon
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  36. Pyrite

    Snapshot Title: Pyrite
    Taken by: Callan Bentley

    Image: Pyrite in greenschist
    Image Owner: Callan Bentley



    Description:

    Cubic habit



  37. Pyrite

    Snapshot Title: Pyrite
    Taken by: Callan Bentley

    Image: Pyrite in greenschist
    Image Owner: Callan Bentley



    Description:

    cubic habit



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pyrite in greenschist
    Image Owner: Callan Bentley



    Description:

    This black bars is 1 cm wide.



  39. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Holey Chesapecten jeffersonius
    Image Owner: Callan Bentley



    Description:

    A collection of sand hiding in one of the bore-holes.



  40. Trackway

    Snapshot Title: Trackway
    Taken by: Callan Bentley

    Image: Mudcracks at Höfn, Iceland
    Image Owner: Callan Bentley



    Description:

    Traces of some critter



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