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Callan Bentley's Snapshots

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  1. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures, Barberton
    Image Owner: Callan Bentley



    Description:

    for scale



  2. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures, Barberton
    Image Owner: Callan Bentley



    Description:

    This black bar is 1 cm wide.



  3. Drapes

    Snapshot Title: Drapes
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures, Barberton
    Image Owner: Callan Bentley



    Description:

    Are these microbial mats draped atop a cobble? Could be.



  4. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures, Barberton
    Image Owner: Callan Bentley



    Description:

    1 cm wide.



  5. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures, Barberton
    Image Owner: Callan Bentley



    Description:

    1 cm black bars on the side.



  6. Fluid escape structure

    Snapshot Title: Fluid escape structure
    Taken by: Callan Bentley

    Image: Fluid escape structure in MISS-dominated sandstones, Moodies Group
    Image Owner: Callan Bentley



    Description:

    The laminations here all "pooch upward" in a feature that appears linear in this cross-sectional view - interpreted as a fluid escape structure deforming the flexible microbial mats.



  7. "Crinklies"

    Snapshot Title: "Crinklies"
    Taken by: Callan Bentley

    Image: Fluid escape structure in MISS-dominated sandstones, Moodies Group
    Image Owner: Callan Bentley



    Description:

    The dark lines here are kerogen - signatures of Archean biofilms.



  8. Sand

    Snapshot Title: Sand
    Taken by: Callan Bentley

    Image: Fluid escape structure in MISS-dominated sandstones, Moodies Group
    Image Owner: Callan Bentley



    Description:

    Massive sandstone with no microbial mat structures.



  9. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Fluid escape structure in MISS-dominated sandstones, Moodies Group
    Image Owner: Callan Bentley



    Description:

    Lens cap from a 35 mm camera



  10. Dam workers

    Snapshot Title: Dam workers
    Taken by: Callan Bentley

    Image: View south from Table Mountain toward Chapman's Peak and the Cape of Good Hope
    Image Owner: Callan Bentley



    Description:

    Working on their dam jobs.



  11. Channels?

    Snapshot Title: Channels?
    Taken by: Callan Bentley

    Image: View south from Table Mountain toward Chapman's Peak and the Cape of Good Hope
    Image Owner: Callan Bentley



    Description:

    There are some low-angle truncating relationships here that suggest channels (which are clearer elsewhere on the mountain).



  12. Large kink fold

    Snapshot Title: Large kink fold
    Taken by: Callan Bentley

    Image: View south from Table Mountain toward Chapman's Peak and the Cape of Good Hope
    Image Owner: Callan Bentley



    Description:

    Tilting layers of the Peninsula Sandstone from horizontal to near vertical and back again.



  13. Chapman's Peak

    Snapshot Title: Chapman's Peak
    Taken by: Callan Bentley

    Image: View south from Table Mountain toward Chapman's Peak and the Cape of Good Hope
    Image Owner: Callan Bentley



    Description:

    a prominent mountain in the mid Cape Peninsula.



  14. Incision

    Snapshot Title: Incision
    Taken by: Callan Bentley

    Image: Heavy mineral sands in planar laminations
    Image Owner: Callan Bentley



    Description:

    into the laminated heavy-mineral-rich sands by overlying massive sandstone.



  15. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Heavy mineral sands in planar laminations
    Image Owner: Callan Bentley



    Description:

    Unfortunately, this came out a bit blurry, but this is a mechanical pencil to serve as a sense of scale. The black bars are each 1 cm in length.



  16. Hikers

    Snapshot Title: Hikers
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    On the trail. The "top-down" perspective of this shot is apparent here upon noting their foreshortened aspect!



  17. Hikers

    Snapshot Title: Hikers
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    on the trail



  18. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Ascending Platteklip Gorge Trail



  19. Peninsula Formation

    Snapshot Title: Peninsula Formation
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    a.k.a. "Table Mountain Sandstone." Some channels can be seen in cross-section on this wall. Explore it here: www.gigapan.com/gigapans/190757



  20. Contour Trail

    Snapshot Title: Contour Trail
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Under this overhang are some nice primary sedimentary structures in the Graafwater Formation. Check them out here: www.gigapan.com/gigapans/190769 and here: www.gigapan.com/gigapans/1907...



  21. Tafelberg Road

    Snapshot Title: Tafelberg Road
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Main access route to the north side of the mountain.



  22. Cape Fold Belt

    Snapshot Title: Cape Fold Belt
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Lost in the distance and mist



  23. Devil's Peak

    Snapshot Title: Devil's Peak
    Taken by: Callan Bentley

    Image: Platteklip Gorge, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Smaller neighbor of Table Mountain



  24. Channels

    Snapshot Title: Channels
    Taken by: Callan Bentley

    Image: Wall of Peninsula Formation Sandstone, Cape Supergroup, Table Mountain
    Image Owner: Callan Bentley



    Description:

    Cutting through otherwise flat-lying sedimentary rock.



  25. 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.



  26. 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.



  27. 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



  28. 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.



  29. 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:

    .



  30. 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.



  31. 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.



  32. 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.



  33. 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.



  34. 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.



  35. 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



  36. 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



  37. 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.



  38. 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



  39. "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.



  40. 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.



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