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Callan Bentley's Snapshots

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  1. Strophomenid

    Snapshot Title: Strophomenid
    Taken by: Callan Bentley

    Image: Brachiopod fauna of the Nealmont Formation, Germany Valley, West Virginia
    Image Owner: Callan Bentley



    Description:

    classic



  2. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Brachiopod fauna of the Nealmont Formation, Germany Valley, West Virginia
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



  3. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Feeder dike(s) of the Catoctin Formation, exposed at Littlle Devil's Stairs Overlook, Skyline Drive, Shenandoah National Park, Virginia
    Image Owner: Callan Bentley



    Description:

    Coarse-grained Grenvillian (Mesoproterozoic) granitoid to the upper left; fine-grained Catoctin basalt dike (Neoproterozoic) to lower right.



  4. Scale pencil
  5. Scale
  6. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Brachiopod fauna of the Nealmont Formation, Germany Valley, WVA
    Image Owner: Callan Bentley



    Description:

    1 cm



  7. Mucrospirifer

    Snapshot Title: Mucrospirifer
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing fossil brachiopod fauna
    Image Owner: Callan Bentley



    Description:

    articulate brachiopods, diagnostic of the Devonian.



  8. Crinoid

    Snapshot Title: Crinoid
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing fossil brachiopod fauna
    Image Owner: Callan Bentley



    Description:

    columnal impression



  9. "A"

    Snapshot Title: "A"
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing fossil brachiopod fauna
    Image Owner: Callan Bentley



    Description:

    The "A" in "MADE IN CHINA"



  10. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Mahantango Formation, showing fossil brachiopod fauna
    Image Owner: Callan Bentley



    Description:

    1 cm from left to right.



  11. "A"

    Snapshot Title: "A"
    Taken by: Callan Bentley

    Image: Diaphragmus brachiopod fossils from the Reynolds Limestone member of the Mauch Chunk Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    The "A" in the MADE IN CHINA label on the pencil.



  12. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Diaphragmus brachiopod fossils from the Reynolds Limestone member of the Mauch Chunk Formation, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    This scale bar is 1 cm long, left to right.



  13. Micro plumose structure

    Snapshot Title: Micro plumose structure
    Taken by: Callan Bentley

    Image: Hornblende at 1950x
    Image Owner: Robin Rohrback



    Description:

    Jumping across a space where cleavage planes can't help accommodate the brittle strain.



  14. Hexacoral

    Snapshot Title: Hexacoral
    Taken by: Callan Bentley

    Image: Devonian coral
    Image Owner: Callan Bentley



    Description:

    calcite in siliceous mudrock.



  15. Breccia

    Snapshot Title: Breccia
    Taken by: Callan Bentley

    Image: Corona Heights Fault, San Francisco
    Image Owner: Callan Bentley



    Description:

    Crushed up rock that formed along the fault zone and in places is stuck to the fault surface. Macro GigaPan of samples collected at the site: gigapan.com/gigapans/185868



  16. Breccia

    Snapshot Title: Breccia
    Taken by: Callan Bentley

    Image: Corona Heights Fault, San Francisco
    Image Owner: Callan Bentley



    Description:

    Crushed up rock that formed along the fault zone and in places is stuck to the fault surface. Macro GigaPan of samples collected at the site: gigapan.com/gigapans/185868



  17. Breccia

    Snapshot Title: Breccia
    Taken by: Callan Bentley

    Image: Corona Heights Fault, San Francisco
    Image Owner: Callan Bentley



    Description:

    Crushed up rock that formed along the fault zone and in places is stuck to the fault surface. Macro GigaPan of samples collected at the site:
    gigapan.com/gigapans/185868



  18. Breccia

    Snapshot Title: Breccia
    Taken by: Callan Bentley

    Image: Corona Heights Fault, San Francisco
    Image Owner: Callan Bentley



    Description:

    This rough patch is fault breccia - crushed up rock that formed along the fault and in places remains stuck to it. Sample macro GigaPan:
    gigapan.com/gigapans/185868



  19. Brecciated green chert

    Snapshot Title: Brecciated green chert
    Taken by: Callan Bentley

    Image: Brecciated chert, Corona Heights Fault, San Francisco, California
    Image Owner: Callan Bentley



    Description:

    Crushed by the Corona Heights fault.



  20. Brecciated red chert

    Snapshot Title: Brecciated red chert
    Taken by: Callan Bentley

    Image: Brecciated chert, Corona Heights Fault, San Francisco, California
    Image Owner: Callan Bentley



    Description:

    Crushed by the Corona Heights fault.



  21. Relatively undeformed green chert

    Snapshot Title: Relatively undeformed green chert
    Taken by: Callan Bentley

    Image: Brecciated chert, Corona Heights Fault, San Francisco, California
    Image Owner: Callan Bentley



    Description:

    For comparison.



  22. Relatively undeformed red chert

    Snapshot Title: Relatively undeformed red chert
    Taken by: Callan Bentley

    Image: Brecciated chert, Corona Heights Fault, San Francisco, California
    Image Owner: Callan Bentley



    Description:

    For comparison.



  23. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Brecciated chert, Corona Heights Fault, San Francisco, California
    Image Owner: Callan Bentley



    Description:

    1 cm



  24. Trilobite?

    Snapshot Title: Trilobite?
    Taken by: Callan Bentley

    Image: Bryozoan rich limestone
    Image Owner: Callan Bentley



    Description:

    Bit of the cheek "horn"?



  25. Fenestrate bryozoan

    Snapshot Title: Fenestrate bryozoan
    Taken by: Callan Bentley

    Image: Bryozoan rich limestone
    Image Owner: Callan Bentley



    Description:

    "Little windows"



  26. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Bryozoan rich limestone
    Image Owner: Callan Bentley



    Description:

    1 cm long bar.



  27. Crinoid stem

    Snapshot Title: Crinoid stem
    Taken by: Callan Bentley

    Image: Leptaena brachipod in fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Columnal



  28. Branching bryozoan

    Snapshot Title: Branching bryozoan
    Taken by: Callan Bentley

    Image: Leptaena brachipod in fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Little pores all over it.



  29. Fenestrate bryozoan

    Snapshot Title: Fenestrate bryozoan
    Taken by: Callan Bentley

    Image: Leptaena brachipod in fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Scrap of it, anyhow.



  30. Leptaena

    Snapshot Title: Leptaena
    Taken by: Callan Bentley

    Image: Leptaena brachipod in fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    Articulate brachiopod



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Leptaena brachipod in fossiliferous limestone
    Image Owner: Callan Bentley



    Description:

    This scale bar is 1 cm long (top to bottom)



  32. What's this?

    Snapshot Title: What's this?
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    Trace fossils in sediment? Encrusting bryozoan?



  33. Crinoid stem

    Snapshot Title: Crinoid stem
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    A second example.



  34. Crinoid stem

    Snapshot Title: Crinoid stem
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    It's not just brachiopods in these rocks!



  35. Orthotetes

    Snapshot Title: Orthotetes
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    (brachiopod specimen number 2)



  36. Orthotetes

    Snapshot Title: Orthotetes
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    (brachiopod specimen number 1)



  37. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Strophomenid brachiopods
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  38. Rounding

    Snapshot Title: Rounding
    Taken by: Callan Bentley

    Image: Rounded cobble of intrusion breccia
    Image Owner: Callan Bentley



    Description:

    Indicating some substantial amount of transport.



  39. Lighter colored material

    Snapshot Title: Lighter colored material
    Taken by: Callan Bentley

    Image: Rounded cobble of intrusion breccia
    Image Owner: Callan Bentley



    Description:

    Representing subsequent intrusion.



  40. Phenocryst

    Snapshot Title: Phenocryst
    Taken by: Callan Bentley

    Image: Rounded cobble of intrusion breccia
    Image Owner: Callan Bentley



    Description:

    in porphyry that was then shattered and intruded.



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