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Callan Bentley's Snapshots

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  1. Walkers

    Snapshot Title: Walkers
    Taken by: Callan Bentley

    Image: The Golden Gate
    Image Owner: Callan Bentley



    Description:

    Folks walking across the bridge.



  2. Radar dish looking thingie

    Snapshot Title: Radar dish looking thingie
    Taken by: Callan Bentley

    Image: The Golden Gate
    Image Owner: Callan Bentley



    Description:

    I wonder what this is for?



  3. Car

    Snapshot Title: Car
    Taken by: Callan Bentley

    Image: The Golden Gate
    Image Owner: Callan Bentley



    Description:

    On the other side



  4. Notebook

    Snapshot Title: Notebook
    Taken by: Callan Bentley

    Image: Lower Cretaceous Cloverly Fm. - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    for scale



  5. Dike

    Snapshot Title: Dike
    Taken by: Callan Bentley

    Image: Wapiti Fm. Volcaniclastics - Cody, WY
    Image Owner: Jeffrey Rollins



    Description:

    with columnar jointing



  6. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Slab of Spechty Kopf Diamictite
    Image Owner: Callan Bentley



    Description:

    Big faceted clast in a finer-grained, laminated matrix.



  7. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Slab of Spechty Kopf Diamictite
    Image Owner: Callan Bentley



    Description:

    1 cm wide blue bar



  8. Styracosaurus?

    Snapshot Title: Styracosaurus?
    Taken by: Callan Bentley

    Image: South Peak #2 - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Or some other horned ceratopsian?



  9. Another critter

    Snapshot Title: Another critter
    Taken by: Callan Bentley

    Image: "Talking Bears" Outcrop - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Again, for scale (?)...



  10. Critter

    Snapshot Title: Critter
    Taken by: Callan Bentley

    Image: "Talking Bears" Outcrop - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    ...for scale?



  11. Truck

    Snapshot Title: Truck
    Taken by: Callan Bentley

    Image: Upper Gypsum Springs Formation - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    for scale



  12. Detachment fault?

    Snapshot Title: Detachment fault?
    Taken by: Callan Bentley

    Image: West Face - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Looks like the massive resistant layer is overriding itself here.



  13. ????

    Snapshot Title: ????
    Taken by: Callan Bentley

    Image: Black Cretaceous Shales - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Is this an asymmetric fold, with left over right?



  14. Steep normal fault

    Snapshot Title: Steep normal fault
    Taken by: Callan Bentley

    Image: Black Cretaceous Shales - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Right side down relative to left.



  15. Clastic dike?

    Snapshot Title: Clastic dike?
    Taken by: Callan Bentley

    Image: Black Cretaceous Shales - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    This little "lightning bolt" shaped bit suggests to me a clastic dike, infilled w/ light-colored fluidized sand (also seen along the trace of the fault to the lower right).



  16. Normal fault

    Snapshot Title: Normal fault
    Taken by: Callan Bentley

    Image: Black Cretaceous Shales - Sheep Mountain Anticline, WY
    Image Owner: Jeffrey Rollins



    Description:

    Lovely set of marker beds, showing apparent normal offset.



  17. iPhone

    Snapshot Title: iPhone
    Taken by: Callan Bentley

    Image: Earthquake Lake Scarp - Hebgen Lake Road, MT
    Image Owner: Jeffrey Rollins



    Description:

    For scale



  18. Bold rust

    Snapshot Title: Bold rust
    Taken by: Callan Bentley

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



    Description:

    On a joint surface.



  19. Scours

    Snapshot Title: Scours
    Taken by: Callan Bentley

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



    Description:

    Several preserved asymmetric trough-like scours here.



  20. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

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



    Description:

    Paleocurrent flow from right (east) to left (west).



  21. Rust

    Snapshot Title: Rust
    Taken by: Callan Bentley

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



    Description:

    More iron oxide staining on joint faces.



  22. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

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



    Description:

    Pretty clear truncation. Strata are not overturned.



  23. 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.



  24. 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.



  25. 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.



  26. 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.



  27. 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.



  28. 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.



  29. 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).



  30. 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.



  31. 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



  32. 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...



  33. 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.



  34. 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.



  35. 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.



  36. 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.



  37. 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



  38. 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



  39. 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.



  40. 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)



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