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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Komatiite, Barberton Greenstone Belt
    Image Owner: Callan Bentley



    Description:

    1 cm wide black bars along the top.



  2. U-shaped valley

    Snapshot Title: U-shaped valley
    Taken by: Callan Bentley

    Image: Rift Valley, Iceland
    Image Owner: Callan Bentley



    Description:

    Evidently, a glacier once flowed through here.



  3. Lots of lava

    Snapshot Title: Lots of lava
    Taken by: Callan Bentley

    Image: Rift Valley, Iceland
    Image Owner: Callan Bentley



    Description:

    Stack after stack of basalt



  4. Inclination

    Snapshot Title: Inclination
    Taken by: Callan Bentley

    Image: Rift Valley, Iceland
    Image Owner: Callan Bentley



    Description:

    Dike? steep slope covered in lava?



  5. Fault?

    Snapshot Title: Fault?
    Taken by: Callan Bentley

    Image: Rift Valley, Iceland
    Image Owner: Callan Bentley



    Description:

    or just an apparent offset, reflective of a pre-eruptive landscape?



  6. Peekaboo!

    Snapshot Title: Peekaboo!
    Taken by: Callan Bentley

    Image: Goðafoss; upper gorge, Iceland.
    Image Owner: Callan Bentley



    Description:

    Covering up against the harsh Icelandic sun?



  7. Hordes

    Snapshot Title: Hordes
    Taken by: Callan Bentley

    Image: Goðafoss; lower gorge, Iceland.
    Image Owner: Callan Bentley



    Description:

    of tourists



  8. Photographer

    Snapshot Title: Photographer
    Taken by: Callan Bentley

    Image: Goðafoss; lower gorge, Iceland.
    Image Owner: Callan Bentley



    Description:

    Documenting the main falls.



  9. Person for scale

    Snapshot Title: Person for scale
    Taken by: Callan Bentley

    Image: Goðafoss; lower gorge, Iceland.
    Image Owner: Callan Bentley



    Description:

    Crossing the bridge



  10. Team GigaPan

    Snapshot Title: Team GigaPan
    Taken by: Callan Bentley

    Image: Goðafoss; lower gorge, Iceland.
    Image Owner: Callan Bentley



    Description:

    2/3 of them, anyhow.



  11. Van Sweet Van

    Snapshot Title: Van Sweet Van
    Taken by: Callan Bentley

    Image: Pseudocraters at Lake Mývatn, Iceland
    Image Owner: Callan Bentley



    Description:

    My home for the week.



  12. Sense of scale II

    Snapshot Title: Sense of scale II
    Taken by: Callan Bentley

    Image: Pseudocraters at Lake Mývatn, Iceland
    Image Owner: Callan Bentley



    Description:

    Another person to provide a scale calibration.



  13. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Pseudocraters at Lake Mývatn, Iceland
    Image Owner: Callan Bentley



    Description:

    Inadvertent field assistants.



  14. Example label

    Snapshot Title: Example label
    Taken by: Callan Bentley

    Image: Red cross-beds (annotated)
    Image Owner: Callan Bentley



    Description:

    Showing sites where older cross-beds are truncated against the bottom of younger beds.



  15. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Red cross-beds (annotated)
    Image Owner: Callan Bentley



    Description:

    Black bar is 1 cm in width



  16. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Komatiitic ash (meteorite impact layer), Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  17. Longitudinal fractures

    Snapshot Title: Longitudinal fractures
    Taken by: Callan Bentley

    Image: Spinifex texture in komatiite, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    Cutting across the crystals orthogonal to their long axis (shortest distance required to break them).



  18. Spinifex

    Snapshot Title: Spinifex
    Taken by: Callan Bentley

    Image: Spinifex texture in komatiite, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    Nice diverging "V" shape seen here.



  19. Relatively fresh surface

    Snapshot Title: Relatively fresh surface
    Taken by: Callan Bentley

    Image: Spinifex texture in komatiite, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    To contrast with the rest of the sample.



  20. One cm

    Snapshot Title: One cm
    Taken by: Callan Bentley

    Image: Spinifex texture in komatiite, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    Tall



  21. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Differential Weathering, Sideling Hill, Maryland
    Image Owner: Marissa Dudek



    Description:

    Field notebook for scale.



  22. Double trouble

    Snapshot Title: Double trouble
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, Sideling Hill, Maryland
    Image Owner: Marissa Dudek



    Description:

    Two outsized clasts in close proximity.



  23. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, Sideling Hill, Maryland
    Image Owner: Marissa Dudek



    Description:

    Mechanical pencil w/ 1-cm markings



  24. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, Sideling Hill, Maryland
    Image Owner: Marissa Dudek



    Description:

    Big chunk 'floating' in the clay-rich matrix.



  25. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Spechty Kopf Diamictite, Sideling Hill, Maryland
    Image Owner: Marissa Dudek



    Description:

    Big chunk in the clay-rich matrix



  26. Eutaxitic lens

    Snapshot Title: Eutaxitic lens
    Taken by: Callan Bentley

    Image: Huckleberry Ridge Tuff, Madison Valley, Montana
    Image Owner: Callan Bentley



    Description:

    Squashed blob of frothy pumice.



  27. Compaction

    Snapshot Title: Compaction
    Taken by: Callan Bentley

    Image: Huckleberry Ridge Tuff, Madison Valley, Montana
    Image Owner: Callan Bentley



    Description:

    Eutaxitic lens wrapping around the top of a stiff phenocryst.



  28. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Huckleberry Ridge Tuff, Madison Valley, Montana
    Image Owner: Callan Bentley



    Description:

    This is 1 cm tall.



  29. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Portrush: hornfels (contact metamorphosed Lias shale) above Portrush gabbroic/doleritic sill
    Image Owner: Callan Bentley



    Description:

    Black bars on the side of this pencil are each 1 cm long.



  30. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Portrush: hornfels (contact metamorphosed Lias shale) above Portrush gabbroic/doleritic sill
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil w/ 1-cm black bars along its side.



  31. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Portrush: hornfels (contact metamorphosed Lias shale) above Portrush gabbroic/doleritic sill
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1 cm black bars along its side.



  32. Crack

    Snapshot Title: Crack
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    indication of the weak state of lithification in this sample.



  33. Empty socket

    Snapshot Title: Empty socket
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    where a pebble popped out.



  34. Quartzite pebble

    Snapshot Title: Quartzite pebble
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    with pyrolusite dendrites on one side.



  35. Pyrolusite
  36. Appekuny Formation

    Snapshot Title: Appekuny Formation
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    Green argillite



  37. Grinnell Formation

    Snapshot Title: Grinnell Formation
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    Red argillite



  38. Grinnell Formation

    Snapshot Title: Grinnell Formation
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    Reddish quartzite



  39. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Dropstones in weakly-lithified "silt-ite" from Looking Glass Highway, east of Glacier National Park
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide



  40. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Portrush sill: gabbro/diabase
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



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