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Callan Bentley's Snapshots

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  1. GigaPan in progress

    Snapshot Title: GigaPan in progress
    Taken by: Callan Bentley

    Image: "Dragon's Tongue" Outcrop, Corridor H, West Virginia
    Image Owner: Jeffrey Rollins



    Description:

    The results are here: gigapan.com/galleries/10019/gigapans/177078



  2. GigaPanMobile

    Snapshot Title: GigaPanMobile
    Taken by: Callan Bentley

    Image: "Dragon's Tongue" Outcrop, Corridor H, West Virginia
    Image Owner: Jeffrey Rollins



    Description:

    Of MAGICian Callan Bentley gigapan.com/profiles/callanbentley



  3. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Conococheague Formation exposed near Mulberry Run, Virginia
    Image Owner: Jeffrey Rollins



    Description:

    A signal of deposition in a directional current of water.



  4. Crenulated shale

    Snapshot Title: Crenulated shale
    Taken by: Callan Bentley

    Image: Conemaugh Group, showing paleoslump and fluvial scour features, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    1 cm wavelength crinkle folds in the shale right here.



  5. Recumbent folds
  6. What it's all about

    Snapshot Title: What it's all about
    Taken by: Callan Bentley

    Image: Conemaugh Group, showing paleoslump and fluvial scour features, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    The key feature of this outcrop is that the moderately dipping shale and a coal seam are truncated by a shallowly-dipping internally cross-bedded sandstone (with conglomerate).



  7. Truncation of coal

    Snapshot Title: Truncation of coal
    Taken by: Callan Bentley

    Image: Conemaugh Group, showing paleoslump and fluvial scour features, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    This 2 meter wide snapshot shows the key feature of this outcrop - moderately dipping shale and a coal seam truncated by a shallowly-dipping internally cross-bedded sandstone (with conglomerate).



  8. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Conemaugh Group, showing paleoslump and fluvial scour features, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    Jacob's staff with 10 cm increments marked off in blue. Set as a horizontal reference marker, too.



  9. Scroll left

    Snapshot Title: Scroll left
    Taken by: Callan Bentley

    Image: Conococheague Formation exposed near Mulberry Run, Virginia
    Image Owner: Callan Bentley



    Description:

    Take a closer look at the next outcrop to the left (west) with this GigaPan: www.gigapan.com/gigapans/177155



  10. Scroll right

    Snapshot Title: Scroll right
    Taken by: Callan Bentley

    Image: Conococheague Formation at Mulberry Run, showing stromatolites
    Image Owner: Callan Bentley



    Description:

    Take a look at the next outcrop to the right (east): gigapan.com/gigapans/150643



  11. Stromatolite

    Snapshot Title: Stromatolite
    Taken by: Callan Bentley

    Image: Conococheague Formation at Mulberry Run, showing stromatolites
    Image Owner: Callan Bentley



    Description:

    dome-shaped layered microbial mat



  12. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Conococheague Formation at Mulberry Run, showing stromatolites
    Image Owner: Callan Bentley



    Description:

    to serve as a sense of scale.



  13. Bedding orientation

    Snapshot Title: Bedding orientation
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    320°, 50° (right hand rule)



  14. Coal inclusion

    Snapshot Title: Coal inclusion
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Coalified tree trunk? Deformed coal stratum?



  15. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Bedding here is folded to a subvertical (slightly overturned position) - It's 295°, 10° at the lower left of this snapshot (right hand rule), 152°, 90° in the middle right (along the edge of the b...



  16. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Looks like some folding (soft sediment deformation??) in this gray shale package.



  17. Marker bed

    Snapshot Title: Marker bed
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Prominent thick-bedded sandstone with central coal seam; stained orange. Hanging wall.



  18. Marker bed

    Snapshot Title: Marker bed
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Prominent thick-bedded sandstone with central coal seam; stained orange. Footwall.



  19. Slip surface

    Snapshot Title: Slip surface
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Running through the middle of this snapshot is a slip surface that dips to the left (west) and offsets a prominent orangey-colored massive sandstone double-bed with a coal seam running through the mid...



  20. Road sign

    Snapshot Title: Road sign
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Showing distances to towns, headed west.



  21. Attitude change

    Snapshot Title: Attitude change
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Big swivel in the orientation of bedding here - close to horizontal at left; gets much steeper to the right.



  22. Channel scour

    Snapshot Title: Channel scour
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Sandstone portion is most obvious, but there are subparallel strata below it too.



  23. The Dragon's Tongue

    Snapshot Title: The Dragon's Tongue
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    Coal bed with forked offshoots



  24. Dan Doctor's rig

    Snapshot Title: Dan Doctor's rig
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    to serve as a sense of scale



  25. Mitch Blake's rig

    Snapshot Title: Mitch Blake's rig
    Taken by: Callan Bentley

    Image: Conemaugh Group, Corridor H
    Image Owner: Callan Bentley



    Description:

    to serve as a sense of scale



  26. Crenulation in shale

    Snapshot Title: Crenulation in shale
    Taken by: Callan Bentley

    Image: Paleoslump and Fluvial Incision Structures, Conemaugh Group, Corridor H, West Virginia
    Image Owner: Marissa Dudek



    Description:

    Small ~1cm wavelength crinkles in the platy shale.



  27. Recumbent folds

    Snapshot Title: Recumbent folds
    Taken by: Callan Bentley

    Image: Paleoslump and Fluvial Incision Structures, Conemaugh Group, Corridor H, West Virginia
    Image Owner: Marissa Dudek



    Description:

    I noted these recumbent folds (axial plane ~horizontal) in the field.



  28. Sectioned clast

    Snapshot Title: Sectioned clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Exposed on 2 surfaces



  29. Dark-colored clast

    Snapshot Title: Dark-colored clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Long axis included w/in the plane of foliation (late Ordovician Taconian Orogeny)



  30. Small mica-rich clast

    Snapshot Title: Small mica-rich clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    w/ reaction halo



  31. Large, mica-rich clast

    Snapshot Title: Large, mica-rich clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    bearing a reaction halo around it



  32. Light-colored clast

    Snapshot Title: Light-colored clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Apparently well rounded.



  33. Hammerhead

    Snapshot Title: Hammerhead
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    for scale



  34. Shadow

    Snapshot Title: Shadow
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    of the GigaPan



  35. Fresh vs. weathered surfaces

    Snapshot Title: Fresh vs. weathered surfaces
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    This rock rusts!



  36. Lichen

    Snapshot Title: Lichen
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Not clasts



  37. Foliated clast

    Snapshot Title: Foliated clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Where the (coarser; gneissic) foliation internal to the clast is oblique to the regional foliation in the surrounding matrix.



  38. Quartz clast

    Snapshot Title: Quartz clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Oblique to foliation.



  39. Hammer for scale

    Snapshot Title: Hammer for scale
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    Here's the top of the hammer handle.



  40. Weathered out clast

    Snapshot Title: Weathered out clast
    Taken by: Callan Bentley

    Image: Sykesville Formation, Chain Bridge Flats, DC
    Image Owner: Callan Bentley



    Description:

    You can see a little tail of relatively-unweathered biotite-rich clast to the right of the joint trace.



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