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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

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



    Description:

    This is 1 centimeter.



  2. 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?



  3. 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 ...



  4. 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



  5. 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



  6. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

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



    Description:

    Signature of volcanic devolatilization.



  7. Shell fragment

    Snapshot Title: Shell fragment
    Taken by: Callan Bentley

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



    Description:

    Rounded along the edges.



  8. 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.



  9. 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



  10. 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



  11. 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



  12. 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.



  13. 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.



  14. 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



  15. 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



  16. 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



  17. 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



  18. 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.



  19. 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.



  20. 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.



  21. 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



  22. 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.



  23. 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



  24. 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



  25. 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?



  26. Oddity

    Snapshot Title: Oddity
    Taken by: Callan Bentley

    Image: Graptolites
    Image Owner: Robin Rohrback



    Description:

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



  27. "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...



  28. 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



  29. 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



  30. Bathtub rings

    Snapshot Title: Bathtub rings
    Taken by: Callan Bentley

    Image: Lava Lake, Montana
    Image Owner: Callan Bentley



    Description:

    Showing former lake levels; marked by pollen and silt.



  31. Dike

    Snapshot Title: Dike
    Taken by: Callan Bentley

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



    Description:

    Granite intruding schist



  32. Tunnel

    Snapshot Title: Tunnel
    Taken by: Callan Bentley

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



    Description:

    Railroad hole punched through the mountain.



  33. Hoodoo caprock

    Snapshot Title: Hoodoo caprock
    Taken by: Callan Bentley

    Image: Hell's Half Acre, Wyoming
    Image Owner: Callan Bentley



    Description:

    Brown sandstone



  34. Arrest lines

    Snapshot Title: Arrest lines
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    on the side of a fallen column.



  35. Contrail

    Snapshot Title: Contrail
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    Looks like a stitching error at first, but it's a truncated airplane contrail.



  36. Hanging valley

    Snapshot Title: Hanging valley
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    Former site of a tributary glacier.



  37. Volcanic breccia

    Snapshot Title: Volcanic breccia
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    Ancient lahars



  38. More columns

    Snapshot Title: More columns
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    across Hyalite Canyon



  39. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    through the columns. You can see their polygonal form.



  40. Western Westfall

    Snapshot Title: Western Westfall
    Taken by: Callan Bentley

    Image: "The Ampitheater" in Hyalite Canyon, Gallatin Range, Montana
    Image Owner: Callan Bentley



    Description:

    I spy an Earth science teacher in the forest!



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