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Callan Bentley's Snapshots

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  1. 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.



  2. 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.



  3. 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



  4. 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.



  5. 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



  6. 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



  7. 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?



  8. Oddity

    Snapshot Title: Oddity
    Taken by: Callan Bentley

    Image: Graptolites
    Image Owner: Robin Rohrback



    Description:

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



  9. "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...



  10. 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



  11. 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



  12. 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.



  13. Dike

    Snapshot Title: Dike
    Taken by: Callan Bentley

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



    Description:

    Granite intruding schist



  14. 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.



  15. Hoodoo caprock

    Snapshot Title: Hoodoo caprock
    Taken by: Callan Bentley

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



    Description:

    Brown sandstone



  16. 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.



  17. 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.



  18. 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.



  19. 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



  20. 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



  21. 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.



  22. 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!



  23. Ghostly GigaPanner wife and offspring

    Snapshot Title: Ghostly GigaPanner wife and offspring
    Taken by: Callan Bentley

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



    Description:

    Baxter and Lily make an appearance.



  24. Column

    Snapshot Title: Column
    Taken by: Callan Bentley

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



    Description:

    We collected this tall, skinny fellow and brought him home with us.



  25. 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 column.



  26. Car

    Snapshot Title: Car
    Taken by: Callan Bentley

    Image: Sacagawea Peak from the south, halfway along the ridge toward the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    on the road to Fairy Lake campground



  27. Hikers

    Snapshot Title: Hikers
    Taken by: Callan Bentley

    Image: Sacagawea Peak from the south, halfway along the ridge toward the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    to provide a sense of scale



  28. Fairy Lake

    Snapshot Title: Fairy Lake
    Taken by: Callan Bentley

    Image: Sacagawea Peak from the south, halfway along the ridge toward the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    a deep lovely blue



  29. Amsden Formation

    Snapshot Title: Amsden Formation
    Taken by: Callan Bentley

    Image: Sacagawea Peak from the south, halfway along the ridge toward the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Characteristically red in color.



  30. Kink band

    Snapshot Title: Kink band
    Taken by: Callan Bentley

    Image: Sacagawea Peak from the south, halfway along the ridge toward the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Folded strata of the Mississippian Lodgepole Formation.



  31. Waulsortian-type bioherm

    Snapshot Title: Waulsortian-type bioherm
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Massive limestone with lots of associated Paleozoic invertebrate fossils.



  32. The Great Unconformity

    Snapshot Title: The Great Unconformity
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Mesoproterozoic on the left (west); Cambrian and younger on the right (east). Trees on the Precambrian section.



  33. Sacagawea Peak

    Snapshot Title: Sacagawea Peak
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Two climbers on the summit of the highest peak in the Bridger Range.



  34. Bozeman / Gallatin Field Airport

    Snapshot Title: Bozeman / Gallatin Field Airport
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    The spankin' new terminal.



  35. Gallatin Gateway

    Snapshot Title: Gallatin Gateway
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    Here's where the Gallatin River emerges (flowing north) from the Gallatin / Madison Range block. Gallatin Mountains on the left; Madison Range on the right.



  36. Brick Breeden Fieldhouse

    Snapshot Title: Brick Breeden Fieldhouse
    Taken by: Callan Bentley

    Image: Sacagawea Peak from bioherms near the Thunderer, Bridger Range, Montana
    Image Owner: Callan Bentley



    Description:

    on the campus of Montana State University.



  37. Ant

    Snapshot Title: Ant
    Taken by: Callan Bentley

    Image: Sandstone blocks near Seneca Quarry, MD
    Image Owner: sladler



    Description:

    on patrol.



  38. Dead centipede

    Snapshot Title: Dead centipede
    Taken by: Callan Bentley

    Image: Sandstone blocks near Seneca Quarry, MD
    Image Owner: sladler



    Description:

    Poor fellow!



  39. Joint set

    Snapshot Title: Joint set
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes at Mather Gorge (Great Falls, MD)
    Image Owner: sladler



    Description:

    Parallel to the dikes - so the joints likely preceded the intrusion of the lamprophyre. Which means the crust here had cooled to brittle conditions by before the intrusion of the dikes (~360 Ma), and ...



  40. "Where are those lamprophyre dikes?"

    Snapshot Title: "Where are those lamprophyre dikes?"
    Taken by: Callan Bentley

    Image: Lamprophyre Dikes at Mather Gorge (Great Falls, MD)
    Image Owner: sladler



    Description:

    "I don't know; I thought they were around here somewhere..."



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