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Callan Bentley's Snapshots

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  1. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Sub-Torridonian unconformity, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Erosional unconformity



  2. Gneissic banding

    Snapshot Title: Gneissic banding
    Taken by: Callan Bentley

    Image: Sub-Torridonian unconformity, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    visible here - dipping at about 45 degrees to the left.



  3. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Sub-Torridonian unconformity, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with 1 centimeter length black bars running down the side.



  4. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Sub-Torridonian unconformity, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with 1 centimeter length black bars running down the side.



  5. Angular clast

    Snapshot Title: Angular clast
    Taken by: Callan Bentley

    Image: Paleovalley in the Stoer Group / Lewisian Gneiss unconformity surface.
    Image Owner: Callan Bentley



    Description:

    These chunks haven't traveled far by the looks of it.



  6. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Paleovalley in the Stoer Group / Lewisian Gneiss unconformity surface.
    Image Owner: Callan Bentley



    Description:

    between 3.0 Ga gneisses and 1.2 Ga Stoer Group sediments



  7. Foliation

    Snapshot Title: Foliation
    Taken by: Callan Bentley

    Image: Paleovalley in the Stoer Group / Lewisian Gneiss unconformity surface.
    Image Owner: Callan Bentley



    Description:

    Gneissic banding is ~vertical here.



  8. Big boulders

    Snapshot Title: Big boulders
    Taken by: Callan Bentley

    Image: Paleovalley in the Stoer Group / Lewisian Gneiss unconformity surface.
    Image Owner: Callan Bentley



    Description:

    dropped into the flanks of this ancient valley.



  9. Paleovalley

    Snapshot Title: Paleovalley
    Taken by: Callan Bentley

    Image: Paleovalley in the Stoer Group / Lewisian Gneiss unconformity surface.
    Image Owner: Callan Bentley



    Description:

    filled in with breccia



  10. Another shell

    Snapshot Title: Another shell
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    in cross-section, concave up.



  11. Traces of jerks

    Snapshot Title: Traces of jerks
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus productid brachiopod fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Vandals apparently come up here for some destructive fun every now and again.



  12. Another batch of shells

    Snapshot Title: Another batch of shells
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    In 3D and cross-section.



  13. Shells

    Snapshot Title: Shells
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus productid brachiopod fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    in cross-section



  14. 3D shells

    Snapshot Title: 3D shells
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus productid brachiopod fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Exposed on the underside of the bedding plane.



  15. 3D shells

    Snapshot Title: 3D shells
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Exposed on the underside of the bedding plane.



  16. Cross-section of shells
  17. Cross-section of shell

    Snapshot Title: Cross-section of shell
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Gigantoproductus giganteus en.wikipedia.org/wiki/Gigantoproductus_giganteus Will open in a new tab or window



  18. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Gigantoproductus giganteus productid brachiopod fossils in Permian limestone, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Pencil with 1 cm black bars along the side.



  19. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Mylonite at Corrie Sands, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Each black bar is 1 cm long.



  20. Fulmar petrel

    Snapshot Title: Fulmar petrel
    Taken by: Callan Bentley

    Image: Drumadoon Sill
    Image Owner: Callan Bentley



    Description:

    Or jaeger?



  21. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Drumadoon Sill
    Image Owner: Callan Bentley



    Description:

    Two pigeons.



  22. Host rock

    Snapshot Title: Host rock
    Taken by: Callan Bentley

    Image: Drumadoon Sill
    Image Owner: Callan Bentley



    Description:

    Permian red beds



  23. Shell

    Snapshot Title: Shell
    Taken by: Callan Bentley

    Image: Sediment from the St. Ninian's Isle Tombolo, Scotland
    Image Owner: Robin Rohrback



    Description:

    Most of the light-colored material is CaCO3 shell fragments.



  24. Quartz

    Snapshot Title: Quartz
    Taken by: Callan Bentley

    Image: Sediment from the St. Ninian's Isle Tombolo, Scotland
    Image Owner: Robin Rohrback



    Description:

    Weathered out of veins in metamorphics?



  25. Phyllite

    Snapshot Title: Phyllite
    Taken by: Callan Bentley

    Image: Sediment from the St. Ninian's Isle Tombolo, Scotland
    Image Owner: Robin Rohrback



    Description:

    Plenty of outcrops of Dalradian phyllite on the neighboring landmasses.



  26. Splotches

    Snapshot Title: Splotches
    Taken by: Callan Bentley

    Image: Contact between two dikes, Blackwaterfoot, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Which are raindrops, which are amygdules?



  27. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Contact between two dikes, Blackwaterfoot, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Between the two intrusions. Which came first?



  28. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Contact between two dikes, Blackwaterfoot, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    1 cm



  29. Scale
  30. Valley

    Snapshot Title: Valley
    Taken by: Callan Bentley

    Image: Jura as viewed from Islay
    Image Owner: Callan Bentley



    Description:

    incised into raised beach platform.



  31. Paps of Jura

    Snapshot Title: Paps of Jura
    Taken by: Callan Bentley

    Image: Jura as viewed from Islay
    Image Owner: Callan Bentley



    Description:

    Mountains held up by quartzite.



  32. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Hutton's Unconformity, Arran
    Image Owner: Callan Bentley



    Description:

    Pencil w/ 1 cm black bars along the side.



  33. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Same fault? Or a different one?



  34. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Offset in the contact here.



  35. Strain

    Snapshot Title: Strain
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    These large grains show evidence of pressure solution in response to pure shear.



  36. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with 1 cm black bars along the side.



  37. Gradation

    Snapshot Title: Gradation
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Even in this small area, a gradational grain size transition can be observed.



  38. Crisp contact

    Snapshot Title: Crisp contact
    Taken by: Callan Bentley

    Image: Inverted graded bedding in Dalradian metagraywackes, Lochranza, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Non-gradational switch from coarse to fine. So which what's up?



  39. Outsized clast

    Snapshot Title: Outsized clast
    Taken by: Callan Bentley

    Image: Port Askaig "Tillite" (Diamictite), Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Large chunk of granite



  40. Chilled margin

    Snapshot Title: Chilled margin
    Taken by: Callan Bentley

    Image: Dike cross-cutting Colonsay Group meta-sediments, Machir Beach, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Edge of dike, contact w/ host rocks.



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