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Callan Bentley's Snapshots

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  1. 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



    Description:

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



  2. Cross-cutting

    Snapshot Title: Cross-cutting
    Taken by: Callan Bentley

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



    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.



  3. Grinding marks

    Snapshot Title: Grinding marks
    Taken by: Callan Bentley

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



    Description:

    Sloppy work



  4. Asbestiform mineral

    Snapshot Title: Asbestiform mineral
    Taken by: Callan Bentley

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



    Description:

    vein fill



  5. 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



    Description:

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



  6. Amygdule

    Snapshot Title: Amygdule
    Taken by: Callan Bentley

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



    Description:

    Filled with epidote and quartz



  7. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Coal
    Image Owner: Robin Rohrback



    Description:

    :)



  8. 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



    Description:

    How many phases of growth can you count here?



  9. Vein

    Snapshot Title: Vein
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback



    Description:

    of calcite



  10. Mud crack triple junction

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

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback



    Description:

    .



  11. Gypsum crystal cast

    Snapshot Title: Gypsum crystal cast
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback



    Description:

    Evaporite strata



  12. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Mudcracks and Gypsum Casts
    Image Owner: Robin Rohrback



    Description:

    1 cm wide



  13. 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



  14. 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.



  15. 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.



  16. 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.



  17. 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.



  18. 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.



  19. 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.



  20. 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.



  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. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  23. Pipkrakes

    Snapshot Title: Pipkrakes
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Ice crystals growing out the soil



  24. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1-cm markings



  25. 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.



  26. Triple point

    Snapshot Title: Triple point
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Intersection of 3 conchoidal fractures



  27. 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



  28. Impurities / flow banding

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

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    And pretty colors



  29. 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



  30. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Scoop shaped



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  32. Plagioclase?

    Snapshot Title: Plagioclase?
    Taken by: Callan Bentley

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



    Description:

    striations...



  33. Pyroxene

    Snapshot Title: Pyroxene
    Taken by: Callan Bentley

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



    Description:

    .



  34. Plagioclase

    Snapshot Title: Plagioclase
    Taken by: Callan Bentley

    Image: Porphyritic andesite, Crazy Mountains, Montana
    Image Owner: Callan Bentley



    Description:

    feldspar



  35. Vesicle

    Snapshot Title: Vesicle
    Taken by: Callan Bentley

    Image: Porphyritic Vesicular Basalt from Ka Lae, Hawaii
    Image Owner: Callan Bentley



    Description:

    Hole from degassing



  36. Olivine

    Snapshot Title: Olivine
    Taken by: Callan Bentley

    Image: Porphyritic Vesicular Basalt from Ka Lae, Hawaii
    Image Owner: Callan Bentley



    Description:

    .



  37. Gneiss

    Snapshot Title: Gneiss
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Collection location unknown.



  38. Mudcracks

    Snapshot Title: Mudcracks
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Silurian-aged Tonoloway Formation carbonates, old quarry on old Route 55, West Virginia. Close-up of outcrop:
    gigapan.com/gigapans/90685



  39. Brachipods

    Snapshot Title: Brachipods
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    In Oriskany Formation standstone, Corridor H, West Virginia



  40. Quartzite

    Snapshot Title: Quartzite
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Weverton Formation, Thoroughfare Gap, Virginia.



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