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Callan Bentley's Snapshots

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  1. Contrast

    Snapshot Title: Contrast
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes at Mather Gorge (Great Falls, MD)
    Image Owner: sladler



    Description:

    A clear color and texture contrast can be observed here between the dikes and the host rock.



  2. Paul

    Snapshot Title: Paul
    Taken by: Callan Bentley

    Image: Passage Creek NOT in flood
    Image Owner: Callan Bentley



    Description:

    the runner!



  3. Starling

    Snapshot Title: Starling
    Taken by: Callan Bentley

    Image: Passage Creek NOT in flood
    Image Owner: Callan Bentley



    Description:

    Sturnus vulgaris.



  4. Cristo Rey

    Snapshot Title: Cristo Rey
    Taken by: Callan Bentley

    Image: Angular Unconformity, west of El Paso, Texas
    Image Owner: Callan Bentley



    Description:

    Summit, with arrow.



  5. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    10 centimeters on the meter stick



  6. Debris piled up

    Snapshot Title: Debris piled up
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    on the upstream side of the fence.



  7. Cant get across

    Snapshot Title: Cant get across
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Oh well...



  8. Starlings

    Snapshot Title: Starlings
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Two European starlings, Sturnus vulgaris



  9. Alteration

    Snapshot Title: Alteration
    Taken by: Callan Bentley

    Image: Cristo Rey: Mesilla Valley Formation - contact with Campus Andesite
    Image Owner: Callan Bentley



    Description:

    Hydrothermal (?) alteration (staining of black shale to white) along a fracture system oriented orthogonally to bedding within the Mesilla Valley Formation.



  10. Critter hole

    Snapshot Title: Critter hole
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Wasp? Beetle?



  11. Ashy layers

    Snapshot Title: Ashy layers
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Lots of fine-bedded ash layers from the pyroclastic surge (ash-flow).



  12. Lapilli

    Snapshot Title: Lapilli
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Coarser grained layer, with many concentrically-layered "accretionary" lapilli.



  13. Vesicular

    Snapshot Title: Vesicular
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Was this the top of the flow that the block was derived from?



  14. Blotchy

    Snapshot Title: Blotchy
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Little clusters of plagioclase?



  15. High & dry

    Snapshot Title: High & dry
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    The horses are on the next terrace up from the floodplain, and they're happy to be there.



  16. No go

    Snapshot Title: No go
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    This is where the road dips under water level.



  17. European Starling

    Snapshot Title: European Starling
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Sturnus vulgaris



  18. Natural levee

    Snapshot Title: Natural levee
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Slightly above water level as the flood begins to ebb



  19. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Another sense of scale.



  20. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    This is 1 centimeter.
    Scale card courtesy of the Virginia Department of Geology and Mineral Resources.



  21. Split

    Snapshot Title: Split
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    I swear, I told them not to move!



  22. H2O bottle

    Snapshot Title: H2O bottle
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    But it looks empty.



  23. Shotgun shells

    Snapshot Title: Shotgun shells
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    People shoot guns here.



  24. Climbing ripples

    Snapshot Title: Climbing ripples
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    in pyroclastic surge deposits



  25. Marc

    Snapshot Title: Marc
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    EPCC / UTEP student who's really into geophysics.



  26. Jenni

    Snapshot Title: Jenni
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    UTEP / EPCC student working on GigaPans with Joshua Villalobos.



  27. Debbie Caskey #2

    Snapshot Title: Debbie Caskey #2
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    She moved!



  28. Joshua Villalobos

    Snapshot Title: Joshua Villalobos
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    Geology professor at El Paso Community College.



  29. Debbie Caskey #1

    Snapshot Title: Debbie Caskey #1
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    Geology professor at El Paso Community College.



  30. Joe

    Snapshot Title: Joe
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    A tough hiker and a great guy.



  31. Basalt

    Snapshot Title: Basalt
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    The Afton flow, 70 to 80 ka in age.



  32. Baked!

    Snapshot Title: Baked!
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    Contact metamorphism from the ash-flow.



  33. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    10 centimeters on the meter stick.



  34. Missing bomb/block

    Snapshot Title: Missing bomb/block
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail C
    Image Owner: Callan Bentley



    Description:

    A hole, with sedimentary laminations wrapping around it.



  35. Lapilli layer

    Snapshot Title: Lapilli layer
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail C
    Image Owner: Callan Bentley



    Description:

    Some of these lapilli have concentric zonation, indicating their accretionary nature.



  36. Cross-bedding

    Snapshot Title: Cross-bedding
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail C
    Image Owner: Callan Bentley



    Description:

    in surge (ash-flow) deposits.



  37. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail C
    Image Owner: Callan Bentley



    Description:

    Some volcano was pretty gassy when it popped off this eruption.



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail C
    Image Owner: Callan Bentley



    Description:

    10 centimeters on a 1-meter stick.



  39. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail D
    Image Owner: Callan Bentley



    Description:

    pencil with 1-cm black bars along the side.



  40. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Cristo Rey: Mesilla Valley Formation - contact with Campus Andesite
    Image Owner: Callan Bentley



    Description:

    Mesilla Valley Formation (sedimentary rocks: sandstone and shale layers) on the left; Campus Andesite (igneous rocks of the Cristo Rey laccolith) on the right.



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