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Callan Bentley's Snapshots

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  1. Iron oxide staining

    Snapshot Title: Iron oxide staining
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Successive flow fronts mineralized on a joint surface.



  2. Veins cutting bedding

    Snapshot Title: Veins cutting bedding
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Nice example of the phenomenon.



  3. Interesting bedding structure

    Snapshot Title: Interesting bedding structure
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Not sure what's going on here. Pretty bold contrast, though.



  4. Quartz vein

    Snapshot Title: Quartz vein
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Crystal structure appears to the naked eye to be more or less homogeneous across this feature.



  5. Breakage

    Snapshot Title: Breakage
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Quartz veins can serve as planes of weakness, facilitating modern re-cracking in the same spot as ancient fractures.



  6. Dips

    Snapshot Title: Dips
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Both the quartz veins and bedding dip to the east, but at different angles of inclination.



  7. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Right (east) side up, relative to left (west).



  8. Sugary texture

    Snapshot Title: Sugary texture
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Fused quartz grains - definitely a metamorphic rock.



  9. Deformation

    Snapshot Title: Deformation
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    small-offset fold/fault pair



  10. Pine cone

    Snapshot Title: Pine cone
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    This is in focus...



  11. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Visible here and there.



  12. Sheared primary sedimentary structures

    Snapshot Title: Sheared primary sedimentary structures
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Possible scours + cross-bedding, sheared (top to the left; east over west) to oversteepen the right side.



  13. Quartz vein

    Snapshot Title: Quartz vein
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Offsetting bedding (black lines are traces of bedding), apparently with a east-over-west kinematic sense.



  14. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Weverton Formation exposed at Thoroughfare Gap, Virginia
    Image Owner: Callan Bentley



    Description:

    Each black bar on the pencil is 1 cm.



  15. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation, showing Reynolds Limestone Member
    Image Owner: Callan Bentley



    Description:

    At this wall: www.gigapan.com/gigapans/181674



  16. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Mauch Chunk Formation
    Image Owner: Joshua Benton



    Description:

    At this wall: www.gigapan.com/gigapans/181674



  17. Convolute contact

    Snapshot Title: Convolute contact
    Taken by: Callan Bentley

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



    Description:

    between shalier layer and overlying massive, fossiliferous layer.



  18. Articulate brachiopod - both valves

    Snapshot Title: Articulate brachiopod - both valves
    Taken by: Callan Bentley

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



    Description:

    Still articulated! (buried alive)



  19. Cavity fill

    Snapshot Title: Cavity fill
    Taken by: Callan Bentley

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



    Description:

    A nice geopetal indicator: the lower part of the shell is full of sediment; the upper (formerly empty) part is filled with sparry calcite.



  20. Cavity fill

    Snapshot Title: Cavity fill
    Taken by: Callan Bentley

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



    Description:

    A nice geopetal indicator: the lower part of the shell is full of sediment; the upper (formerly empty) part is filled with sparry calcite.



  21. Gastropod

    Snapshot Title: Gastropod
    Taken by: Callan Bentley

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



    Description:

    (fossil)



  22. Gastropod

    Snapshot Title: Gastropod
    Taken by: Callan Bentley

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



    Description:

    (fossil)



  23. Gastropod

    Snapshot Title: Gastropod
    Taken by: Callan Bentley

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



    Description:

    (fossil)



  24. Strophomenid brachiopod

    Snapshot Title: Strophomenid brachiopod
    Taken by: Callan Bentley

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



    Description:

    (fossil)



  25. Strophomenid bachiopod

    Snapshot Title: Strophomenid bachiopod
    Taken by: Callan Bentley

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



    Description:

    (fossil)



  26. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    Each of the black bars on the side of this pencil is 1 centimeter in length.



  27. A closer look
  28. A closer look
  29. Spechty Kopf diamictite

    Snapshot Title: Spechty Kopf diamictite
    Taken by: Callan Bentley

    Image: Latest Devonian Spechty Kopf formation roadcut on Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    The next unit down in the sequence is this diamictite: www.gigapan.com/gigapans/181670



  30. Clast w/ apparent faceted shape

    Snapshot Title: Clast w/ apparent faceted shape
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  31. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  32. Big quartz pebble

    Snapshot Title: Big quartz pebble
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  33. Granitic clast

    Snapshot Title: Granitic clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    w/ apparent faceted shape.



  34. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  35. Faceted clast

    Snapshot Title: Faceted clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  36. Outsized, blurry clast

    Snapshot Title: Outsized, blurry clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  37. WHY are all the good ones out of focus?

    Snapshot Title: WHY are all the good ones out of focus?
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Aaargh.



  38. Outsized clast w/ faceted shape

    Snapshot Title: Outsized clast w/ faceted shape
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  39. Outsized clast.

    Snapshot Title: Outsized clast.
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  40. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, exposed on Corridor H, West Virginia (second berm)
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



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