1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar


Callan Bentley's Snapshots

Go to page:
  1. More detail

    Snapshot Title: More detail
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    This area is also covered (at closer range, with fewer trees) in another GigaPan:
    gigapan.com/gigapans/122629



  2. Fluids flowing...

    Snapshot Title: Fluids flowing...
    Taken by: Callan Bentley

    Image: Boxwork on Sandstone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    ...through an orthogonal set of cracks permeated into the surrounding sandstone, making it tougher than non-fluid-soaked sandstone. Later, weathering etched out the primary sandstone, but had a harder...



  3. Grallator

    Snapshot Title: Grallator
    Taken by: Callan Bentley

    Image: Therapod Tracks 2
    Image Owner: Alan Pitts



    Description:

    Three toes with pointy tips



  4. Recumbent antiforms and synform

    Snapshot Title: Recumbent antiforms and synform
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Or is it synforms and antiforms?
    ...Depends on which way it got turned over. Based on the westward vergence of the rest of the structures here, I'm guessing 2 antiforms and a central synform.



  5. Squirrel nest??

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

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    I've never known squirrels to nest on cliffs rather than trees, but this looks like one of their leaf nests.



  6. Folding

    Snapshot Title: Folding
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    of a quartz vein



  7. Boudinage

    Snapshot Title: Boudinage
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    in a quartz vein



  8. Overturned synform

    Snapshot Title: Overturned synform
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Awesome.



  9. Overturned synform

    Snapshot Title: Overturned synform
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Great example of some of the structures to be seen in this highly-deformed portion of the Catoctin Formation.



  10. Parasitic folds

    Snapshot Title: Parasitic folds
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Small scale folds in the hinge area of a larger (meso-scale) fold in the Catoctin greenstone's foliation.



  11. Funny

    Snapshot Title: Funny
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    The things you get with an auto-focus GigaPan! :)



  12. Boudin neck

    Snapshot Title: Boudin neck
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Looks like some of the quartz veins were stretched under brittle-ductile conditions, depending on their orientation relative to the stress field.



  13. Kink band

    Snapshot Title: Kink band
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    The Catoctin greenstone's foliation (itself a product of metamorphism and deformation) is here seen to be kinked, meaning post-metamorphic deformation either under a lower temperature/pressure regime...



  14. Vein tip

    Snapshot Title: Vein tip
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    Astonishing variation in thickness over such a short distance - think of how flexible the greenstone would have to be to rip in this particular way.



  15. Vein tip

    Snapshot Title: Vein tip
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    From fat to nonexistent in a few inches!



  16. Intersection

    Snapshot Title: Intersection
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    of cleavage (moderately dipping to right) and joint set (steeply dipping to right).



  17. Tight to isoclinal folding

    Snapshot Title: Tight to isoclinal folding
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    of quartz veins within the Catoctin Formation.



  18. Cuspate-lobate folding

    Snapshot Title: Cuspate-lobate folding
    Taken by: Callan Bentley

    Image: Catoctin Metabasalt at Point of Rocks Maryland
    Image Owner: Chris Johnson



    Description:

    The cusps of greenstone and broad lobes of the quartz vein suggest a marked viscosity contrast between the two units as folding occured. Sometimes the term "ptygmatic" (one of the greatest words in al...



  19. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    dipping moderately to the east.



  20. Folded tension gashes

    Snapshot Title: Folded tension gashes
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    These fat, relatively-short veins show disharmonic cuspate/lobate folding. Their light color provides good contrast against the dark green of the Catoctin greenstone.



  21. Drill marks

    Snapshot Title: Drill marks
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    These subvertical features appear to be the drill holes associated with dynamite blasting - no doubt related to opening up space for the C&O Canal and/or the B&O Railroad during construction of that i...



  22. Snow

    Snapshot Title: Snow
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    Residual snow/ice on the cliffs.



  23. Veins

    Snapshot Title: Veins
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    Quartz veins are common features at this site, and some show evidence of post-emplacement deformation (folding).



  24. Cleavage & joints

    Snapshot Title: Cleavage & joints
    Taken by: Callan Bentley

    Image: Exposure of Catoctin Metabasalt at Point of Rocks, Maryland
    Image Owner: Chris Johnson



    Description:

    Cleavage is the pervasive moderate-angle feature dipping to the right (east). The steeply-dipping, more widely-spaced features are a prominent joint set.



  25. Great white shark

    Snapshot Title: Great white shark
    Taken by: Callan Bentley

    Image: Aquarium
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Cruising death machine of the deep. Don't let him mistake your finger for a fur seal.



  26. Pillow basalts

    Snapshot Title: Pillow basalts
    Taken by: Callan Bentley

    Image: Aquarium
    Image Owner: Robin Rohrback-Schiavone



    Description:

    That must be some hot lava to still be incandescent so far from the submarine vent.



  27. Water gap

    Snapshot Title: Water gap
    Taken by: Callan Bentley

    Image: LIDAR Weverton Formation - Blue Ridge front, Virginia
    Image Owner: Callan Bentley



    Description:

    Drainage vs. structure. Drainage wins.



  28. Wow

    Snapshot Title: Wow
    Taken by: Callan Bentley

    Image: LIDAR Weverton Formation - Blue Ridge front, Virginia
    Image Owner: Callan Bentley



    Description:

    Dextrally asymmetric folds



  29. Z fold

    Snapshot Title: Z fold
    Taken by: Callan Bentley

    Image: LIDAR Weverton Formation - Blue Ridge front, Virginia
    Image Owner: Callan Bentley



    Description:

    Expressed as subtle topography



  30. What's wrong with this picture?

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

    Image: Passage Creek in Flood II
    Image Owner: Callan Bentley



    Description:

    : )



  31. Natural levee

    Snapshot Title: Natural levee
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    Defining the right bank of the stream



  32. Floodplains...

    Snapshot Title: Floodplains...
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    ...are for flooding!



  33. The road dives down

    Snapshot Title: The road dives down
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    On the far side of the creek, Spring Mountain Way splashes down into the floodplain.



  34. Flood debris

    Snapshot Title: Flood debris
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    Flotsam piled up on the upstream side of the bridge.



  35. The bridge

    Snapshot Title: The bridge
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    This set of rapids is due to our low-water bridge, suffering under high water.



  36. Normal width of the creek

    Snapshot Title: Normal width of the creek
    Taken by: Callan Bentley

    Image: Passage Creek in Flood I
    Image Owner: Callan Bentley



    Description:

    Between these 2 lines of trees.



  37. Unique texture

    Snapshot Title: Unique texture
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    This object seems to be unique in this sample in its finely-pebbled texture.



  38. Trilobite glabella?

    Snapshot Title: Trilobite glabella?
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Upside-down trilobite "nose"?



  39. Trilobite segment

    Snapshot Title: Trilobite segment
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    This appears to be segment from the thorax of a trilobite ("rachis" + "pleura"??)



  40. Crinoid columnal and branching bryozoan

    Snapshot Title: Crinoid columnal and branching bryozoan
    Taken by: Callan Bentley

    Image: Keyser Limestone
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Great detail - so small!



Go to page: