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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Absaroka Volcanic Breccia
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  2. Pipkrakes

    Snapshot Title: Pipkrakes
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Ice crystals growing out the soil



  3. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pipkrake garden
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1-cm markings



  4. 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.



  5. Triple point

    Snapshot Title: Triple point
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Intersection of 3 conchoidal fractures



  6. 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



  7. Impurities / flow banding

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

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    And pretty colors



  8. 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



  9. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    Scoop shaped



  10. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Obsidian trio
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  11. Plagioclase?

    Snapshot Title: Plagioclase?
    Taken by: Callan Bentley

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



    Description:

    striations...



  12. Pyroxene

    Snapshot Title: Pyroxene
    Taken by: Callan Bentley

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



    Description:

    .



  13. Plagioclase

    Snapshot Title: Plagioclase
    Taken by: Callan Bentley

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



    Description:

    feldspar



  14. Vesicle

    Snapshot Title: Vesicle
    Taken by: Callan Bentley

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



    Description:

    Hole from degassing



  15. Olivine

    Snapshot Title: Olivine
    Taken by: Callan Bentley

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



    Description:

    .



  16. Gneiss

    Snapshot Title: Gneiss
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Collection location unknown.



  17. 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



  18. Brachipods

    Snapshot Title: Brachipods
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    In Oriskany Formation standstone, Corridor H, West Virginia



  19. Quartzite

    Snapshot Title: Quartzite
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Weverton Formation, Thoroughfare Gap, Virginia.



  20. Plant fossils

    Snapshot Title: Plant fossils
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Pennsylvanian-aged Allegheny Formation, edge of Appalachian Plateau, Corridor H, West Virginia.



  21. Bedding / cleavage

    Snapshot Title: Bedding / cleavage
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Widely-spaced cleavage cutting-across bedding in Devonian-aged Helderberg limestone, Corridor H, West Virginia.



  22. Sag pillow

    Snapshot Title: Sag pillow
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Sandstone "ball and pillow" structure from redbeds of Devonian Hampshire Formation, Corridor H, West Virginia. Close-up:
    www.gigapan.com/gigapans/146668



  23. "Ploudin"

    Snapshot Title: "Ploudin"
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Boudin / Sag pillow from latest Devonian Spechty Kopf diamictite, Corridor H, West Virginia.



  24. Greenschist

    Snapshot Title: Greenschist
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Catoctin Formation



  25. Tempestite

    Snapshot Title: Tempestite
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Limestone, Devonian of West Virginia



  26. Arkose

    Snapshot Title: Arkose
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    from Culpeper Basin



  27. Cockeysville

    Snapshot Title: Cockeysville
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    Marble



  28. Slickensides

    Snapshot Title: Slickensides
    Taken by: Callan Bentley

    Image: Rock Garden
    Image Owner: Callan Bentley



    Description:

    .



  29. Fault / vein

    Snapshot Title: Fault / vein
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Offset and extension (dilation)



  30. Stylolite "steps"

    Snapshot Title: Stylolite "steps"
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Pressure solution's signature



  31. Finer sediment

    Snapshot Title: Finer sediment
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Limy mud filling shell is significantly finer than that outside the shell.



  32. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Yet another example for figuring out which way was up during the time of deposition.



  33. Faulted shell

    Snapshot Title: Faulted shell
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Offset and dilation



  34. Stylolite

    Snapshot Title: Stylolite
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Pressure solution seam



  35. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Small offset



  36. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Another half-sediment-filled (lower half), half-sparry-calcite-cement-filled (upper half) shell.



  37. Partly sediment-filled shell

    Snapshot Title: Partly sediment-filled shell
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Geopetal structure - upper half of space is filled with sparry calcite.



  38. Fossilized lophophore

    Snapshot Title: Fossilized lophophore
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    gray material inside shell?



  39. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Blue bar is 1 cm wide.



  40. Potassium feldspar

    Snapshot Title: Potassium feldspar
    Taken by: Callan Bentley

    Image: Porphyritic andesite
    Image Owner: Callan Bentley



    Description:

    White/tan/pinkish and blocky



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