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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    This bar is 1 cm long.



  2. Quartz

    Snapshot Title: Quartz
    Taken by: Callan Bentley

    Image: Gneiss
    Image Owner: Callan Bentley



    Description:

    Vitreous and translucent



  3. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Gneiss
    Image Owner: Callan Bentley



    Description:

    Big and bold, like a fine merlot



  4. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Gneiss
    Image Owner: Callan Bentley



    Description:

    1 cm long scale bar on pencil



  5. Hairy cone

    Snapshot Title: Hairy cone
    Taken by: Callan Bentley

    Image: Strobilus cone fossil
    Image Owner: Callan Bentley



    Description:

    This cone had lots of little flanges coming off of it.



  6. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Strobilus cone fossil
    Image Owner: Callan Bentley



    Description:

    A single scale on the cone.



  7. Cone

    Snapshot Title: Cone
    Taken by: Callan Bentley

    Image: Strobilus cone fossil
    Image Owner: Callan Bentley



    Description:

    Gymnosperm cone



  8. Locality info

    Snapshot Title: Locality info
    Taken by: Callan Bentley

    Image: Strobilus cone fossil
    Image Owner: Callan Bentley



    Description:

    Where the sample was collected.



  9. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Strobilus cone fossil
    Image Owner: Callan Bentley



    Description:

    1 cm



  10. Lineation

    Snapshot Title: Lineation
    Taken by: Callan Bentley

    Image: Basement complex, MP 16.3 on I-66 (westbound), east of Linden, Virginia
    Image Owner: Callan Bentley



    Description:

    The imaged surface of this sample is the plane of foliation. These lines on that plane are a mineral lineation. Overall, the sample is an L>S tectonic.



  11. Vein

    Snapshot Title: Vein
    Taken by: Callan Bentley

    Image: Basement complex, MP 16.3 on I-66 (westbound), east of Linden, Virginia
    Image Owner: Callan Bentley



    Description:

    Fibrous chlorite and quartz filling an extensional vein. Fibers presumably aligned with extensional direction.



  12. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Basement complex, MP 16.3 on I-66 (westbound), east of Linden, Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm in length (top to bottom).



  13. Crinoid columnal stem

    Snapshot Title: Crinoid columnal stem
    Taken by: Callan Bentley

    Image: Martinsburg Fm. crinoids and brachiopods
    Image Owner: Callan Bentley



    Description:

    Side view



  14. Self-recursive

    Snapshot Title: Self-recursive
    Taken by: Callan Bentley

    Image: Martinsburg Fm. crinoids and brachiopods
    Image Owner: Callan Bentley



    Description:

    Crinoid columnal inside a larger crinoid columnal.



  15. Bryozoan

    Snapshot Title: Bryozoan
    Taken by: Callan Bentley

    Image: Martinsburg Fm. crinoids and brachiopods
    Image Owner: Callan Bentley



    Description:

    Branching morphology



  16. Brachiopod

    Snapshot Title: Brachiopod
    Taken by: Callan Bentley

    Image: Martinsburg Fm. crinoids and brachiopods
    Image Owner: Callan Bentley



    Description:

    Big one.



  17. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Fm. crinoids and brachiopods
    Image Owner: Callan Bentley



    Description:

    This bar is 1 cm long.



  18. Crinoid columnal impression

    Snapshot Title: Crinoid columnal impression
    Taken by: Callan Bentley

    Image: Passage Creek Fauna of the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Echinoderm stem segment.



  19. Brachiopod

    Snapshot Title: Brachiopod
    Taken by: Callan Bentley

    Image: Passage Creek Fauna of the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Some sort of articulate brachiopod.



  20. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Passage Creek Fauna of the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    1 cm long bar



  21. Brachiopod

    Snapshot Title: Brachiopod
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Strophomenid?



  22. Shell

    Snapshot Title: Shell
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Original/recrystallized CaCO3 shell material?



  23. Crinoid stem

    Snapshot Title: Crinoid stem
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Poking up, plunging to upper right.



  24. Nautiloid

    Snapshot Title: Nautiloid
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    With "crushing crease" running longitudinally down the length of its cone.



  25. Brachiopod

    Snapshot Title: Brachiopod
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    Strophomenid?



  26. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fossils in the Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm "tall".



  27. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Anorthosite, Adirondack Mountains, New York
    Image Owner: Callan Bentley



    Description:

    Bars on the pencil are 1 cm in length.



  28. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Anorthosite, Adirondack Mountains, New York
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  29. Reaction rims

    Snapshot Title: Reaction rims
    Taken by: Callan Bentley

    Image: Anorthosite, Adirondack Mountains, New York
    Image Owner: Callan Bentley



    Description:

    Necklaces of garnet around pyroxene amid plagioclase.



  30. Holey moley

    Snapshot Title: Holey moley
    Taken by: Callan Bentley

    Image: LiDAR-based digital elevation map of the Timberville, VA quadrangle
    Image Owner: Callan Bentley



    Description:

    So many sinkholes!!



  31. Sinkholes

    Snapshot Title: Sinkholes
    Taken by: Callan Bentley

    Image: LiDAR-based digital elevation map of the Timberville, VA quadrangle
    Image Owner: Callan Bentley



    Description:

    Karst much?



  32. Timberville

    Snapshot Title: Timberville
    Taken by: Callan Bentley

    Image: LiDAR-based digital elevation map of the Timberville, VA quadrangle
    Image Owner: Callan Bentley



    Description:

    The town



  33. Brock's Gap

    Snapshot Title: Brock's Gap
    Taken by: Callan Bentley

    Image: LiDAR-based digital elevation map of the Timberville, VA quadrangle
    Image Owner: Callan Bentley



    Description:

    Water gap! Martinsburg to Oswego transition exposed.



  34. Asymmetry

    Snapshot Title: Asymmetry
    Taken by: Callan Bentley

    Image: Stromatolites and ooids in banded iron formation
    Image Owner: Callan Bentley



    Description:

    Interesting that there appears to be more of the relatively coarse hematite on one side of the this stromatolite than the other.



  35. Hematite ooids

    Snapshot Title: Hematite ooids
    Taken by: Callan Bentley

    Image: Stromatolites and ooids in banded iron formation
    Image Owner: Callan Bentley



    Description:

    Inorganic primary concretions



  36. Stromatolitic laminae

    Snapshot Title: Stromatolitic laminae
    Taken by: Callan Bentley

    Image: Stromatolites and ooids in banded iron formation
    Image Owner: Callan Bentley



    Description:

    Fossil photosynthetic slime.



  37. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stromatolites and ooids in banded iron formation
    Image Owner: Callan Bentley



    Description:

    This bar is 1 cm in length.



  38. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Littleton Formation Schist from Mt. Washington, NH
    Image Owner: Robin Rohrback



    Description:

    Rather petite, next to the pseudoandalusites.



  39. Ripple?

    Snapshot Title: Ripple?
    Taken by: Callan Bentley

    Image: Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    check out the 3D variation in thickness of this sand bed. Is this a preserved ripple crest?



  40. Sandstone vs. shale

    Snapshot Title: Sandstone vs. shale
    Taken by: Callan Bentley

    Image: Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    The two lithologies at this outcrop weather out differently.



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