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Callan Bentley's Snapshots

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  1. 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.



  2. Suture

    Snapshot Title: Suture
    Taken by: Callan Bentley

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



    Description:

    Pressure solution!



  3. 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...



  4. 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



  5. 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



  6. 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



  7. 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



  8. 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



  9. 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.



  10. 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.



  11. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    This is 1 centimeter.



  12. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    This is 1 centimeter.



  13. 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?



  14. 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 ...



  15. 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



  16. 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



  17. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

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



    Description:

    Signature of volcanic devolatilization.



  18. Shell fragment

    Snapshot Title: Shell fragment
    Taken by: Callan Bentley

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



    Description:

    Rounded along the edges.



  19. 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.



  20. 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



  21. 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



  22. 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



  23. 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.



  24. 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.



  25. 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



  26. 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



  27. 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



  28. 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



  29. 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.



  30. Tool marks?

    Snapshot Title: Tool marks?
    Taken by: Callan Bentley

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



    Description:

    Little divots and grooves on the bottom of this bed.



  31. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    1 inch.



  32. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

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



    Description:

    Which way is up?
    Consider this hand-sample for a hint:
    gigapan.com/gigapans/141297



  33. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    Inches on top; centimeters on bottom.



  34. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

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



    Description:

    Which way is up?
    Consider this hand sample for a hint:
    gigapan.com/gigapans/141297



  35. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

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



    Description:

    Which way is up (hint = more clay in the well-cleaved stratum)?
    Here's a hand-sample to consider: gigapan.com/gigapans/141297



  36. Turbidite boundary

    Snapshot Title: Turbidite boundary
    Taken by: Callan Bentley

    Image: Graded Bedding in the Martinsburg Formation
    Image Owner: Robin Rohrback



    Description:

    Crisp meeting of coarse (light colored) and fine (dark colored). Which way is up?



  37. Oddity

    Snapshot Title: Oddity
    Taken by: Callan Bentley

    Image: Graptolites
    Image Owner: Robin Rohrback



    Description:

    What is this semi-transparent striated object? Any ideas?



  38. "Sawteeth"

    Snapshot Title: "Sawteeth"
    Taken by: Callan Bentley

    Image: Graptolites
    Image Owner: Robin Rohrback



    Description:

    The sawteeth along the edge of this dark-colored graptolite are the theca, the little 'cups' that held the individual graptolite animals. The larger structure is actually a colony of multiple individu...



  39. See a sample

    Snapshot Title: See a sample
    Taken by: Callan Bentley

    Image: Cristo Rey: Mesilla Valley Formation - contact with Campus Andesite
    Image Owner: Callan Bentley



    Description:

    To explore the mineralogy and texture of the Campus Andesite in more detail, please visit this macro GigaPan:
    gigapan.com/gigapans/140390



  40. S-fold

    Snapshot Title: S-fold
    Taken by: Callan Bentley

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



    Description:

    Lovely little fold



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