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Callan Bentley's Snapshots

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  1. Fold

    Snapshot Title: Fold
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    Small antiform overprinting gneissic banding.



  2. Big clasts

    Snapshot Title: Big clasts
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    In the Stoer sediments.



  3. Paleomag hole

    Snapshot Title: Paleomag hole
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    "research vandalism"



  4. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    of the Stoer group - above the unconformity.



  5. Gneissic banding

    Snapshot Title: Gneissic banding
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    foliation in Lewisian gneiss.



  6. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Stoer group unconformity (over Lewisian gneiss), Clachtoll, Scotland.
    Image Owner: Callan Bentley



    Description:

    1 cm black bars on the side.



  7. T-shaped joint intersection pattern

    Snapshot Title: T-shaped joint intersection pattern
    Taken by: Callan Bentley

    Image: Microbially-induced sedimentary structures in Stoer Group, Clachtoll, Scotland
    Image Owner: Callan Bentley



    Description:

    Which set came first?



  8. More biolaminate

    Snapshot Title: More biolaminate
    Taken by: Callan Bentley

    Image: Microbially-induced sedimentary structures in Stoer Group, Clachtoll, Scotland
    Image Owner: Callan Bentley



    Description:

    Fine, slime-crinkled layers.



  9. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Microbially-induced sedimentary structures in Stoer Group, Clachtoll, Scotland
    Image Owner: Callan Bentley



    Description:

    1 cm black bars running down its length.



  10. Folded rip-up "clast" of MISS

    Snapshot Title: Folded rip-up "clast" of MISS
    Taken by: Callan Bentley

    Image: Microbially-induced sedimentary structures in Stoer Group, Clachtoll, Scotland
    Image Owner: Callan Bentley



    Description:

    MISS = Microbially induced sedimentary structure.



  11. Microbial mat laminae

    Snapshot Title: Microbial mat laminae
    Taken by: Callan Bentley

    Image: Microbially-induced sedimentary structures in Stoer Group, Clachtoll, Scotland
    Image Owner: Callan Bentley



    Description:

    Slimy biofilms that trapped fine sediment.



  12. Skolithos

    Snapshot Title: Skolithos
    Taken by: Callan Bentley

    Image: Salterella Grit, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Trace fossils; perpendicular to bedding.



  13. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Salterella Grit, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    This mechanical pencil has black bars (each 1 cm in length) running down its side.



  14. Skolithos

    Snapshot Title: Skolithos
    Taken by: Callan Bentley

    Image: Pipe Rock, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    These are the namesake "pipes"...



  15. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Pipe Rock, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    This mechanical pencil has 1-cm black bars down its side.



  16. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Pipe Rock, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    This mechanical pencil has 1 cm long black bars along its length.



  17. Figure out the elevation of the GigaPan

    Snapshot Title: Figure out the elevation of the GigaPan
    Taken by: Callan Bentley

    Image: Parallel Roads of Glen Roy
    Image Owner: Callan Bentley



    Description:

    based on what you see here.



  18. Sheep for scale

    Snapshot Title: Sheep for scale
    Taken by: Callan Bentley

    Image: Parallel Roads of Glen Roy
    Image Owner: Callan Bentley



    Description:

    This is a sheep.



  19. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Pipe Rock, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1 cm long.



  20. Skolithos

    Snapshot Title: Skolithos
    Taken by: Callan Bentley

    Image: Pipe Rock, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    The trace fossil that gives this unit its name.



  21. Muddy layer(s)

    Snapshot Title: Muddy layer(s)
    Taken by: Callan Bentley

    Image: Smaull greywacke turbidites exposed south of Saligo Bay, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Between more massive sands.



  22. Pencil for scale.

    Snapshot Title: Pencil for scale.
    Taken by: Callan Bentley

    Image: Smaull greywacke turbidites exposed south of Saligo Bay, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1 cm long.



  23. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Folded turbidites of the Smaull Greywacke at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Compare the development of cleavage in the sandier (lighter-colored) layers with the more clay-rich layers (darker-colored).



  24. What primary sedimentary structure?

    Snapshot Title: What primary sedimentary structure?
    Taken by: Callan Bentley

    Image: Folded turbidites of the Smaull Greywacke at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    This bed shows an important primary sedimentary structure. Identify and interpret it.



  25. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Folded turbidites of the Smaull Greywacke at Saligo Bay, Islay, Scotland.
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil w/ 1 cm black bars along the side.



  26. Xenoliths

    Snapshot Title: Xenoliths
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    of metagraywacke in basalt.



  27. Basaltic dike

    Snapshot Title: Basaltic dike
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Cross-cutting metagraywacke.



  28. Pressure shadows

    Snapshot Title: Pressure shadows
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Unknown mineralogy, but that's the pattern.



  29. Pressure shadows

    Snapshot Title: Pressure shadows
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Quartz "beards" on either side of these resistant clasts.



  30. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    between fine grained metagraywacke (above) and coarser metagraywacke (below).



  31. Scale pencil

    Snapshot Title: Scale pencil
    Taken by: Callan Bentley

    Image: Sheared Dalradian metaturbidites w/ dike tip at Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  32. Carbonate clast

    Snapshot Title: Carbonate clast
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    These distinctive yellow clasts were frequently weathered out in neighboring outcrops.



  33. Dropstone?

    Snapshot Title: Dropstone?
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Long axis of clast is perpendicular to sedimentary layering.



  34. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Possible dropstone.



  35. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Black bars are each 1 cm long.



  36. Really big outsized clast

    Snapshot Title: Really big outsized clast
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Among the largest I saw...



  37. Outsized clasts

    Snapshot Title: Outsized clasts
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Maybe they are dropstones...



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    1 cm



  39. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Another big one.



  40. Dropstone?

    Snapshot Title: Dropstone?
    Taken by: Callan Bentley

    Image: Port Askaig Diamictite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Long axis is perpendicular to sedimentary laminations.



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