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Callan Bentley's Snapshots

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  1. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Stromatolites in Helena (Siyeh) Formation Limstone from Alberta, Canada
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Which way is up?



  2. Ostracode

    Snapshot Title: Ostracode
    Taken by: Callan Bentley

    Image: Tonoloway Ostracode Bed
    Image Owner: Callan Bentley



    Description:

    Unusually clean, but with transverse stress fractures.



  3. Ostracode

    Snapshot Title: Ostracode
    Taken by: Callan Bentley

    Image: Tonoloway Ostracode Bed
    Image Owner: Callan Bentley



    Description:

    Partial peel-back of the shell.



  4. Ostracode shell

    Snapshot Title: Ostracode shell
    Taken by: Callan Bentley

    Image: Tonoloway Ostracode Bed
    Image Owner: Callan Bentley



    Description:

    Ostracodes are arthropods with significant "beanlike" shells surrounding their leggy bodies.



  5. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Tonoloway Ostracode Bed
    Image Owner: Callan Bentley



    Description:

    Scale bar



  6. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Crossbedded Fine Sandstone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Which way is up?



  7. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Crossbedded Fine Sandstone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Which way is up?



  8. Vein cutting amydule

    Snapshot Title: Vein cutting amydule
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Amygdule (or at least the epidote component of the amygdule) is older in this case than the vein.



  9. Cross-cutting

    Snapshot Title: Cross-cutting
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    An interesting blend of cross-cutting relationships here: The big amygdule has no vein cutting across it, but the little one to the right does. Hmmm.



  10. Grinding marks

    Snapshot Title: Grinding marks
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Sloppy work



  11. Asbestiform mineral

    Snapshot Title: Asbestiform mineral
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    vein fill



  12. Wakka wakka wakka

    Snapshot Title: Wakka wakka wakka
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Pacman-like vesicle filling of quartz (white) and epidote (green).



  13. Amygdule

    Snapshot Title: Amygdule
    Taken by: Callan Bentley

    Image: Catoctin Formation metabasalt showing amygdules and asbestos veins
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Filled with epidote and quartz



  14. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Coal
    Image Owner: Robin Rohrback-Schiavone



    Description:

    :)



  15. Count the episodes

    Snapshot Title: Count the episodes
    Taken by: Callan Bentley

    Image: Pisolites in Tansil Formation Limestone, Whites City, New Mexico
    Image Owner: Robin Rohrback-Schiavone



    Description:

    How many phases of growth can you count here?



  16. Vein

    Snapshot Title: Vein
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback-Schiavone



    Description:

    of calcite



  17. Mud crack triple junction

    Snapshot Title: Mud crack triple junction
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



  18. Gypsum crystal cast

    Snapshot Title: Gypsum crystal cast
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Evaporite strata



  19. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback-Schiavone



    Description:

    1 cm wide



  20. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Pennsylvanian Alleghanian Formation
    Image Owner: Joshua Benton



    Description:

    Here's a macro GigaPan of a piece of coal collected from this site:
    www.gigapan.com/gigapans/168727



  21. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  22. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  23. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  24. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  25. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  26. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  27. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  28. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    Pre-existing igneous material caught up the lahar.



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  30. Pipkrakes

    Snapshot Title: Pipkrakes
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Ice crystals growing out the soil



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1-cm markings



  32. Fingerprint

    Snapshot Title: Fingerprint
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Oops - should have wiped it down with Windex before shooting the image.



  33. Triple point

    Snapshot Title: Triple point
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Intersection of 3 conchoidal fractures



  34. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Classic look w/ concentric ribs and hackles



  35. Impurities / flow banding

    Snapshot Title: Impurities / flow banding
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    And pretty colors



  36. Two conchoidal fractures

    Snapshot Title: Two conchoidal fractures
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Approaching one another back to back



  37. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Scoop shaped



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  39. Plagioclase?

    Snapshot Title: Plagioclase?
    Taken by: Callan Bentley

    Image: Peridotite from the Josephine Ophiolite
    Image Owner: Robin Rohrback-Schiavone



    Description:

    striations...



  40. Pyroxene

    Snapshot Title: Pyroxene
    Taken by: Callan Bentley

    Image: Peridotite from the Josephine Ophiolite
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



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