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


Callan Bentley's Snapshots

Go to page:
  1. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Cleavage in folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm "tall" - sorry it's blurry. It's in the recess of the outcrop. I should have planned that better.



  2. Cleavage development

    Snapshot Title: Cleavage development
    Taken by: Callan Bentley

    Image: Folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    How does cleavage vary in its prominence from the top to the bottom of this package? What does that imply about the proportion of clay?



  3. Geopetal

    Snapshot Title: Geopetal
    Taken by: Callan Bentley

    Image: Folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    How does grain size (correlates w/ color) change from the bottom to the top of this bed? Is the bed right side up or up-side-down?



  4. Small faults

    Snapshot Title: Small faults
    Taken by: Callan Bentley

    Image: Folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Offsets in sedimentary layers.



  5. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  6. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Folded turbidites at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  7. Apophysis and sheared granite xenoliths

    Snapshot Title: Apophysis and sheared granite xenoliths
    Taken by: Callan Bentley

    Image: Margin of a Scourie dike (contact w/ host rock: Lewisian gneiss)
    Image Owner: Callan Bentley



    Description:

    Interesting area: you can see an apparently undeformed apophysis of the dike into the gneiss, but also sheared-out fragments of nice (xenoliths?) within the larger dike.



  8. Shearing

    Snapshot Title: Shearing
    Taken by: Callan Bentley

    Image: Margin of a Scourie dike (contact w/ host rock: Lewisian gneiss)
    Image Owner: Callan Bentley



    Description:

    Foliation appears sheared into closer parallelism with the margin of the dike here - post emplacement shearing.



  9. Scourie dike

    Snapshot Title: Scourie dike
    Taken by: Callan Bentley

    Image: Margin of a Scourie dike (contact w/ host rock: Lewisian gneiss)
    Image Owner: Callan Bentley



    Description:

    Cross-cuts the Lewisian gneiss.



  10. Lewisian gneiss

    Snapshot Title: Lewisian gneiss
    Taken by: Callan Bentley

    Image: Margin of a Scourie dike (contact w/ host rock: Lewisian gneiss)
    Image Owner: Callan Bentley



    Description:

    Foliated Archean host rock.



  11. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Margin of a Scourie dike (contact w/ host rock: Lewisian gneiss)
    Image Owner: Callan Bentley



    Description:

    Black bars along the side are 1 cm each.



  12. Springs/travertine

    Snapshot Title: Springs/travertine
    Taken by: Callan Bentley

    Image: Imbricate zone, Durness Limestones, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Flowing from one of the many faults in this outcrop.



  13. Ramp

    Snapshot Title: Ramp
    Taken by: Callan Bentley

    Image: Imbricate zone, Durness Limestones, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Thrust sheet



  14. Local sheep...

    Snapshot Title: Local sheep...
    Taken by: Callan Bentley

    Image: Imbricate zone, Durness Limestones, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    ...surveys his domain.



  15. Curious onlooker

    Snapshot Title: Curious onlooker
    Taken by: Callan Bentley

    Image: Imbricate zone, Durness Limestones, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    "What's that robot up to down there?"



  16. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Imbricate zone, Durness Limestones, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  17. Fresh vs. weathered surface

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

    Image: Folds in Lewisian gneiss (weathered), Achmelvich, Scotland
    Image Owner: Callan Bentley



    Description:

    Significant "patina" of iron oxide staining.



  18. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Folds in Lewisian gneiss (weathered), Achmelvich, Scotland
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  19. Nonconformity

    Snapshot Title: Nonconformity
    Taken by: Callan Bentley

    Image: Double unconformity Canisp, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Metamorphic rocks below, sedimentary strata above.



  20. Angular unconformity

    Snapshot Title: Angular unconformity
    Taken by: Callan Bentley

    Image: Double unconformity Canisp, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Where the lower (tilted) beds have been returned to their original horizontal (nontilted) orientation!



  21. Cambrian quartzites

    Snapshot Title: Cambrian quartzites
    Taken by: Callan Bentley

    Image: Double unconformity Canisp, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Youngest of the three units seen here.



  22. Torridonian

    Snapshot Title: Torridonian
    Taken by: Callan Bentley

    Image: Double unconformity Canisp, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Proterozoic red sandstones, the intermediate unit of the three here.



  23. Lewisian gneiss

    Snapshot Title: Lewisian gneiss
    Taken by: Callan Bentley

    Image: Double unconformity Canisp, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Oldest of the three units seen here.



  24. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Moine Thrust at Knockan Crag, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  25. Scale pencil

    Snapshot Title: Scale pencil
    Taken by: Callan Bentley

    Image: Fucoid Beds, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1 cm long.



  26. Where did it go?

    Snapshot Title: Where did it go?
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    What happens to the Scourie dike on the other side of this narrow beach?



  27. Lewisian gneiss

    Snapshot Title: Lewisian gneiss
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    On the other side of the dike.



  28. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    Between dike and host rock.



  29. Scourie dike

    Snapshot Title: Scourie dike
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    Mafic intrusion.



  30. Lewisian gneiss

    Snapshot Title: Lewisian gneiss
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    Archean aged host rocks.



  31. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Scourie dike, Achmelvich Beach
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1 cm long.



  32. Slightyly resorbed xenolith

    Snapshot Title: Slightyly resorbed xenolith
    Taken by: Callan Bentley

    Image: Gneissic xenolith in Scourie dike mafic rock
    Image Owner: Callan Bentley



    Description:

    A bit of thermal re-equilibration going on, to judge by the shape.



  33. Fresh xenolith

    Snapshot Title: Fresh xenolith
    Taken by: Callan Bentley

    Image: Gneissic xenolith in Scourie dike mafic rock
    Image Owner: Callan Bentley



    Description:

    A chip off the old block.



  34. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Gneissic xenolith in Scourie dike mafic rock
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  35. Characteristic "tubular" weathering of b

    Snapshot Title: Characteristic "tubular" weathering of b
    Taken by: Callan Bentley

    Image: Sandstone roll-up feature in the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Some have interpreted these as 'steam escape structures,' but I'm not sure I'm convinced of that.



  36. Folded over

    Snapshot Title: Folded over
    Taken by: Callan Bentley

    Image: Sandstone roll-up feature in the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    This sandstone "raft" has been folded into a 'toboggan' like shape, presumably by the force of the impactful deposition.



  37. Clast of Lewisian gneiss

    Snapshot Title: Clast of Lewisian gneiss
    Taken by: Callan Bentley

    Image: Sandstone roll-up feature in the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Caught up in the deposit.



  38. Clast of Lewisian gneiss

    Snapshot Title: Clast of Lewisian gneiss
    Taken by: Callan Bentley

    Image: Sandstone roll-up feature in the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Caught up in the deposit.



  39. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Sandstone roll-up feature in the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with 1 centimeter black bars along the side.



  40. Asymmetric folding

    Snapshot Title: Asymmetric folding
    Taken by: Callan Bentley

    Image: Base of the Stac Fada Member of the Clachtoll Formation of the Stoer Group, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    in the layers immediately beneath the deposit.



Go to page: