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Callan Bentley's Snapshots

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  1. Tailed porphyroclast

    Snapshot Title: Tailed porphyroclast
    Taken by: Callan Bentley

    Image: Hibriten Mylonite
    Image Owner: Robin Rohrback



    Description:

    Slight asymmetry; top to the left sense of shear?



  2. Tailed porphyroclast

    Snapshot Title: Tailed porphyroclast
    Taken by: Callan Bentley

    Image: Hibriten Mylonite
    Image Owner: Robin Rohrback



    Description:

    Garnet with reaction rim and amphibolitic tails on each side.



  3. Squirrels

    Snapshot Title: Squirrels
    Taken by: Callan Bentley

    Image: House, viewed from the west, looking east
    Image Owner: Callan Bentley



    Description:

    eating spilled birdseed



  4. Tufted titmouse

    Snapshot Title: Tufted titmouse
    Taken by: Callan Bentley

    Image: House, viewed from the west, looking east
    Image Owner: Callan Bentley



    Description:

    eating sunflower seed



  5. Male downy woodpecker

    Snapshot Title: Male downy woodpecker
    Taken by: Callan Bentley

    Image: House, viewed from the west, looking east
    Image Owner: Callan Bentley



    Description:

    On suet feeder



  6. Grain boundaries impinging

    Snapshot Title: Grain boundaries impinging
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Clear evidence of pressure solution. Also note the other grains along strike to the right.



  7. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This is 1 centimeter.



  8. Weathering rind

    Snapshot Title: Weathering rind
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This pebble (green) has a weathering rind (brown).



  9. Bedding

    Snapshot Title: Bedding
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This pebble contains pre-existing (i.e., pre-pebble-ification) layering.



  10. Grain boundaries

    Snapshot Title: Grain boundaries
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    One grain (green) impinges on its neighbor (brown). P-sol!



  11. P-sol

    Snapshot Title: P-sol
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Another set of grain truncations that suggests strain accomplished via pressure solution.



  12. More truncated grain boundaries

    Snapshot Title: More truncated grain boundaries
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Evidence of pressure solution.



  13. Suture

    Snapshot Title: Suture
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Pressure solution!



  14. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    The Flathead Sandstone unconformably overlies the schist and granite of the Archean basement complex at this site. Explore the sandstone close-up in this macro GigaPan of a small sample from this site...



  15. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore the Flathead Sandstone close-up in this macro GigaPan of a small sample from this site: www.gigapan.com/gigapans/143007



  16. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore the Flathead Sandstone close-up in this macro GigaPan of a small sample from this site: www.gigapan.com/gigapans/143007



  17. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a specimen of granite from this site in detail with this macro GigaPan: www.gigapan.com/gigapans/143006



  18. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a specimen of granite from this site in detail with this macro GigaPan: www.gigapan.com/gigapans/143006



  19. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a sample of granite from this site in more detail in this macro GigaPan: www.gigapan.com/gigapans/143006



  20. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Showing this gray mineral to be quartz.



  21. Graphic

    Snapshot Title: Graphic
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    A little bit of "graphic granite" quartz / potassium feldspar intergrowth.



  22. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    This is 1 centimeter.



  23. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Flathead Sandstone, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    This is 1 centimeter.



  24. Roundness

    Snapshot Title: Roundness
    Taken by: Callan Bentley

    Image: Flathead Sandstone, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Check out how well-rounded these sand grains are - aeolian modification of the grains before eventual deposition in seawater?



  25. Halite casts

    Snapshot Title: Halite casts
    Taken by: Callan Bentley

    Image: Halite Casts
    Image Owner: Callan Bentley



    Description:

    These cubic shapes are casts of halite (salt) crystals that formed under hypersaline conditions on a Devonian tidal flat. Once buried anew by rising tides, the salt crystals dissolved, and mud filled ...



  26. Piece of schist

    Snapshot Title: Piece of schist
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    To see a hand sample of schist from this site, check out this macro GigaPan:
    gigapan.com/gigapans/141715



  27. Piece of schist

    Snapshot Title: Piece of schist
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    To see a macro GigaPan of a sample of schist from this site, please check out this image: gigapan.com/gigapans/141715



  28. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    Signature of volcanic devolatilization.



  29. Shell fragment

    Snapshot Title: Shell fragment
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    Rounded along the edges.



  30. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    On a small bit of obsidian.



  31. Hand sample

    Snapshot Title: Hand sample
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  32. Hand sample

    Snapshot Title: Hand sample
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  33. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  34. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 10 cm in length.



  35. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 10 cm in length.



  36. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  37. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  38. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  39. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  40. Joint set

    Snapshot Title: Joint set
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    A nice set of subparallel fractures.



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