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


Callan Bentley's Snapshots

Go to page:
  1. Ball & pillow

    Snapshot Title: Ball & pillow
    Taken by: Callan Bentley

    Image: Ball & pillow load-sag structures in Graafwater Formation
    Image Owner: Callan Bentley



    Description:

    load / sag structure: soft sediment deformation caused by sand-over-mud density inversion.



  2. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Ball & pillow load-sag structures in Graafwater Formation
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm in length.



  3. Barite horizon

    Snapshot Title: Barite horizon
    Taken by: Callan Bentley

    Image: View across the Barite Valley
    Image Owner: Callan Bentley



    Description:

    Explore an outcrop of barite horizon that crops out here: www.gigapan.com/gigapans/190713



  4. Folds

    Snapshot Title: Folds
    Taken by: Callan Bentley

    Image: View across the Barite Valley
    Image Owner: Callan Bentley



    Description:

    These rocks show evidence of having enjoyed accruing some strain.



  5. Pre-impact chert layers

    Snapshot Title: Pre-impact chert layers
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    .



  6. Spider

    Snapshot Title: Spider
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    These creepy flat spiders were under many of the rocks here.



  7. Another barite horizon

    Snapshot Title: Another barite horizon
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    Above the first, larger one.



  8. Barite horizon

    Snapshot Title: Barite horizon
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    Authigenic barite crystals growing upward off the seafloor and radiating outward.



  9. Ultramafic ash deposit

    Snapshot Title: Ultramafic ash deposit
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    This shard is silicified ultramafic ash, interpreted as impact fallout.



  10. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Barite horizon, Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    Mechanical pencil with 1 cm black bars running down the side.



  11. IGC field trip vehicles

    Snapshot Title: IGC field trip vehicles
    Taken by: Callan Bentley

    Image: View across the Barite Valley to outcrops of the Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    Parked at isolated farm



  12. Spherulitic layer here

    Snapshot Title: Spherulitic layer here
    Taken by: Callan Bentley

    Image: View across the Barite Valley to outcrops of the Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    with associated barite horizon



  13. Fan delta complex

    Snapshot Title: Fan delta complex
    Taken by: Callan Bentley

    Image: View across the Barite Valley to outcrops of the Mapepe Formation of the Fig Tree Group
    Image Owner: Callan Bentley



    Description:

    Prograding out into a basin that was perhaps formed due to crustal disturbance associated with meteorite impact.



  14. Barite Valley

    Snapshot Title: Barite Valley
    Taken by: Callan Bentley

    Image: View toward Barite Valley
    Image Owner: Callan Bentley



    Description:

    Check out the view of the hill to the right, as taken from the hill to the left: www.gigapan.org/gigapans/190708



  15. "Maid of the Mist" Mountain

    Snapshot Title: "Maid of the Mist" Mountain
    Taken by: Callan Bentley

    Image: View toward Barite Valley
    Image Owner: Callan Bentley



    Description:

    Made of aeolian cross-bedded quartz arenites.



  16. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Kaap Valley Pluton exposed along Queens River, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    An oblique view of a mechanical pencil with 1 cm black bars along the side.



  17. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Kaap Valley Pluton, Barberton Greenstone Belt
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm long.



  18. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Mafic enclaves in the Kaap Valley Pluton, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm in length.



  19. Don & Gary

    Snapshot Title: Don & Gary
    Taken by: Callan Bentley

    Image: View east over paleotopographic relief at the base of the Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    Don Lowe (Stanford) and Gary Byerly (Louisiana State University), two of the most experienced Barberton geologists in the world.



  20. Geologists for scale

    Snapshot Title: Geologists for scale
    Taken by: Callan Bentley

    Image: View over outcrops of the Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    Talking over lunch



  21. Geologists for scale

    Snapshot Title: Geologists for scale
    Taken by: Callan Bentley

    Image: View over outcrops of the Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    Having lunch!



  22. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    This yellow bar is 1 cm long (tall).



  23. Buck Reef Chert

    Snapshot Title: Buck Reef Chert
    Taken by: Callan Bentley

    Image: View over paleotopography below the Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    See a block of this beautiful rock here: gigapan.com/gigapans/190694



  24. Geologist for scale

    Snapshot Title: Geologist for scale
    Taken by: Callan Bentley

    Image: View over paleotopography below the Buck Reef Chert
    Image Owner: Callan Bentley



    Description:

    Taking a break...



  25. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Graptolites, Dob's Linn, Scotland
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  26. Pyrite has no cleavage

    Snapshot Title: Pyrite has no cleavage
    Taken by: Callan Bentley

    Image: Pyrite-bearing phyllite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    as this porphyroblast shows



  27. Fresh pyrite

    Snapshot Title: Fresh pyrite
    Taken by: Callan Bentley

    Image: Pyrite-bearing phyllite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Golden luster



  28. Weathered pyrite

    Snapshot Title: Weathered pyrite
    Taken by: Callan Bentley

    Image: Pyrite-bearing phyllite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    Brown patina



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Pyrite-bearing phyllite, Islay, Scotland
    Image Owner: Callan Bentley



    Description:

    1 cm



  30. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Gabbro, Fetlar, Shetland
    Image Owner: Callan Bentley



    Description:

    This is 1 cm long.



  31. Lichen

    Snapshot Title: Lichen
    Taken by: Callan Bentley

    Image: Mylonite, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    little black button style lichen growing on the sample.



  32. Isoclinal fold

    Snapshot Title: Isoclinal fold
    Taken by: Callan Bentley

    Image: Mylonite, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    in mylonitic foliation



  33. Tight fold

    Snapshot Title: Tight fold
    Taken by: Callan Bentley

    Image: Mylonite, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    in mylonitic foliation



  34. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Mylonite, North-West Highlands, Scotland
    Image Owner: Callan Bentley



    Description:

    1 cm



  35. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Stac Fada member of the Clachtoll Formation
    Image Owner: Callan Bentley



    Description:

    This circle (ellipse) is 5 mm in diameter (width).



  36. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Drumadoon Sill
    Image Owner: Callan Bentley



    Description:

    Here's a GIGAmacro of a sample of rock from near this site: gigapan.com/gigapans/189927



  37. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: "Chill and bake," Blackwaterfoot Beach, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    Examine a piece of this porphyry here: gigapan.com/gigapans/189927



  38. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

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



    Description:

    Examine a sample of this porphyry here: gigapan.com/gigapans/189927



  39. Zoning

    Snapshot Title: Zoning
    Taken by: Callan Bentley

    Image: Porphyritic dike rock, Blackwaterfoot, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    = changes in magma composition



  40. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Porphyritic dike rock, Blackwaterfoot, Arran, Scotland
    Image Owner: Callan Bentley



    Description:

    This is 1 cm long.



Go to page: