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Callan Bentley's Snapshots

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  1. A closer look

    Snapshot Title: A closer look
    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:

    At a sample from this site: gigapan.com/gigapans/191028



  2. Small fault

    Snapshot Title: Small fault
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    Offsetting the white layer.



  3. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    This is 1 cm wide.



  4. Chert

    Snapshot Title: Chert
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    White



  5. Hematite

    Snapshot Title: Hematite
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    Specular



  6. Jasper

    Snapshot Title: Jasper
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    red chert



  7. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Banded iron formation, Barberton Greenstone Belt, South Africa
    Image Owner: Callan Bentley



    Description:

    This is 1 cm width.



  8. Rite in the Rain scale card

    Snapshot Title: Rite in the Rain scale card
    Taken by: Callan Bentley

    Image: Mitchems Pit, Matthews County Virginia
    Image Owner: Pete Berquist



    Description:

    And north arrow



  9. Shovel/spade

    Snapshot Title: Shovel/spade
    Taken by: Callan Bentley

    Image: Mitchems Pit, Matthews County Virginia
    Image Owner: Pete Berquist



    Description:

    For scale



  10. Pegmatite?

    Snapshot Title: Pegmatite?
    Taken by: Callan Bentley

    Image: Cape Granite exposed at Sea Point, South Africa
    Image Owner: Callan Bentley



    Description:

    Late in the intrusion? Or is this a thoroughly recrystallized screen of Malmesbury?



  11. Cormorants

    Snapshot Title: Cormorants
    Taken by: Callan Bentley

    Image: Cape Granite exposed at Sea Point, South Africa
    Image Owner: Callan Bentley



    Description:

    Hunkered down



  12. Greenstone

    Snapshot Title: Greenstone
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures and fluvial conglomerate, Barberton
    Image Owner: Callan Bentley



    Description:

    Altered komatiite



  13. Fluid escape structure

    Snapshot Title: Fluid escape structure
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures and fluvial conglomerate, Barberton
    Image Owner: Callan Bentley



    Description:

    laminations pooch upward.



  14. Microbial mats

    Snapshot Title: Microbial mats
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures and fluvial conglomerate, Barberton
    Image Owner: Callan Bentley



    Description:

    draped over the top of a river cobble.



  15. Conglomerate

    Snapshot Title: Conglomerate
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures and fluvial conglomerate, Barberton
    Image Owner: Callan Bentley



    Description:

    Well rounded clasts of chert an granite (oldest zircons in the granite are 3.5 Ga).



  16. Sense of scale

    Snapshot Title: Sense of scale
    Taken by: Callan Bentley

    Image: Microbially induced sedimentary structures and fluvial conglomerate, Barberton
    Image Owner: Callan Bentley



    Description:

    Lens cap from a 35 mm camera



  17. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

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



    Description:

    for scale



  18. 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.



  19. 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.



  20. 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.



  21. 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.



  22. 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.



  23. "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.



  24. 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.



  25. 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



  26. 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.



  27. 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).



  28. 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.



  29. 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.



  30. 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.



  31. 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.



  32. 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!



  33. Hikers

    Snapshot Title: Hikers
    Taken by: Callan Bentley

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



    Description:

    on the trail



  34. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

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



    Description:

    Ascending Platteklip Gorge Trail



  35. 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



  36. 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...



  37. 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.



  38. 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



  39. 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



  40. 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.



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