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Callan Bentley's Snapshots

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  1. 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.



  2. Dike

    Snapshot Title: Dike
    Taken by: Callan Bentley

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



    Description:

    Granite intruding schist



  3. 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.



  4. Hoodoo caprock

    Snapshot Title: Hoodoo caprock
    Taken by: Callan Bentley

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



    Description:

    Brown sandstone



  5. 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.



  6. 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.



  7. 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.



  8. 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



  9. 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



  10. 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.



  11. 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!



  12. 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.



  13. 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.



  14. 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.



  15. 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



  16. 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



  17. 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



  18. 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.



  19. 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.



  20. 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.



  21. 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.



  22. 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.



  23. 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.



  24. 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.



  25. 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.



  26. Ant

    Snapshot Title: Ant
    Taken by: Callan Bentley

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



    Description:

    on patrol.



  27. Dead centipede

    Snapshot Title: Dead centipede
    Taken by: Callan Bentley

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



    Description:

    Poor fellow!



  28. 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 ...



  29. "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..."



  30. Contrast

    Snapshot Title: Contrast
    Taken by: Callan Bentley

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



    Description:

    A clear color and texture contrast can be observed here between the dikes and the host rock.



  31. Paul

    Snapshot Title: Paul
    Taken by: Callan Bentley

    Image: Passage Creek NOT in flood
    Image Owner: Callan Bentley



    Description:

    the runner!



  32. Starling

    Snapshot Title: Starling
    Taken by: Callan Bentley

    Image: Passage Creek NOT in flood
    Image Owner: Callan Bentley



    Description:

    Sturnus vulgaris.



  33. Cristo Rey

    Snapshot Title: Cristo Rey
    Taken by: Callan Bentley

    Image: Angular Unconformity, west of El Paso, Texas
    Image Owner: Callan Bentley



    Description:

    Summit, with arrow.



  34. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail B
    Image Owner: Callan Bentley



    Description:

    10 centimeters on the meter stick



  35. Debris piled up

    Snapshot Title: Debris piled up
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    on the upstream side of the fence.



  36. Cant get across

    Snapshot Title: Cant get across
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Oh well...



  37. Starlings

    Snapshot Title: Starlings
    Taken by: Callan Bentley

    Image: Passage Creek in flood
    Image Owner: Callan Bentley



    Description:

    Two European starlings, Sturnus vulgaris



  38. Alteration

    Snapshot Title: Alteration
    Taken by: Callan Bentley

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



    Description:

    Hydrothermal (?) alteration (staining of black shale to white) along a fracture system oriented orthogonally to bedding within the Mesilla Valley Formation.



  39. Critter hole

    Snapshot Title: Critter hole
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Wasp? Beetle?



  40. Ashy layers

    Snapshot Title: Ashy layers
    Taken by: Callan Bentley

    Image: Kilbourne Hole, detail E
    Image Owner: Callan Bentley



    Description:

    Lots of fine-bedded ash layers from the pyroclastic surge (ash-flow).



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