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Callan Bentley's Snapshots

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  1. Leaf

    Snapshot Title: Leaf
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    A little brown leaf - something native to the eastern slopes of the Sierra Nevada, presumably.



  2. Lint

    Snapshot Title: Lint
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    a stray fiber, probably not native to the sample



  3. Hornblende

    Snapshot Title: Hornblende
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Just a little guy, part of a bigger lithic clast dominated by quartz.



  4. Feldspar

    Snapshot Title: Feldspar
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    .



  5. Feldpsar

    Snapshot Title: Feldpsar
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Boxy, angular shape from 2 planes of cleavage more or less at right angles.



  6. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    A little chunk of rock (multiple mineral crystals in a single particle of sediment).



  7. Organic bits

    Snapshot Title: Organic bits
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    From some of the native scrubby vegetation, no doubt.



  8. Quartz

    Snapshot Title: Quartz
    Taken by: Callan Bentley

    Image: Grus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Conchoidal fracture visible.



  9. What are these?

    Snapshot Title: What are these?
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    Bedfroms? Boudins? Stromatolites?



  10. Another nice little fault

    Snapshot Title: Another nice little fault
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    .



  11. Reduction

    Snapshot Title: Reduction
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    Reduction spots and joint highlighting



  12. Joint

    Snapshot Title: Joint
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    or vein



  13. Small fault and overlying

    Snapshot Title: Small fault and overlying
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    fold...



  14. Field notebook

    Snapshot Title: Field notebook
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    and rope



  15. Fault

    Snapshot Title: Fault
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    offset in white & overlying yellow layers



  16. Fault-bend fold

    Snapshot Title: Fault-bend fold
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    in miniature



  17. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: fold structure in Big Bend National Park (Texas)
    Image Owner: minidani



    Description:

    15 cm



  18. Intruder

    Snapshot Title: Intruder
    Taken by: Callan Bentley

    Image: Mudcracks
    Image Owner: Ron Schott



    Description:

    Hey - what's that doing here?!



  19. Stretched vesicles

    Snapshot Title: Stretched vesicles
    Taken by: Callan Bentley

    Image: Bishop Tuff F2 Ashfall
    Image Owner: Robin Rohrback-Schiavone



    Description:

    inside pumice blobs



  20. Lithic clast

    Snapshot Title: Lithic clast
    Taken by: Callan Bentley

    Image: Bishop Tuff F2 Ashfall
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Entrained in the eruption? Or later contamination from nearby White Mountains source rocks?



  21. Glacier

    Snapshot Title: Glacier
    Taken by: Callan Bentley

    Image: Torres Del Paine with moonrise
    Image Owner: Suk Choo Kim



    Description:

    in the French Valley



  22. Terminus of Grey Glacier

    Snapshot Title: Terminus of Grey Glacier
    Taken by: Callan Bentley

    Image: Torres Del Paine with moonrise
    Image Owner: Suk Choo Kim



    Description:

    .



  23. Moon

    Snapshot Title: Moon
    Taken by: Callan Bentley

    Image: Torres Del Paine with moonrise
    Image Owner: Suk Choo Kim



    Description:

    Or "Luna," if you're actually in Patagonia.



  24. Stoping

    Snapshot Title: Stoping
    Taken by: Callan Bentley

    Image: Torres Del Paine with moonrise
    Image Owner: Suk Choo Kim



    Description:

    When chunks of "host" rock break off from the roof (or walls) of a magma chamber, and become independent liberated bits called "xenoliths."



  25. Olivine phenocrysts

    Snapshot Title: Olivine phenocrysts
    Taken by: Callan Bentley

    Image: Porphyritic Vesicular Basalt from Ka Lae, Hawaii
    Image Owner: Callan Bentley



    Description:

    and vesicles



  26. Axial planar cleavage

    Snapshot Title: Axial planar cleavage
    Taken by: Callan Bentley

    Image: South Fort Valley Antiform
    Image Owner: Alan Pitts



    Description:

    Lovely structure within a structure.



  27. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Olivine-Rich Sand from Ka Lae, Hawai'i
    Image Owner: Robin Rohrback-Schiavone



    Description:

    on the left side of this olivine grain.



  28. 10 cm

    Snapshot Title: 10 cm
    Taken by: Callan Bentley

    Image: Veach Gap Anticline 2
    Image Owner: Alan Pitts



    Description:

    = red line



  29. 10cm

    Snapshot Title: 10cm
    Taken by: Callan Bentley

    Image: Veach Gap Anticline 1
    Image Owner: Alan Pitts



    Description:

    = red stripe



  30. Mr. E. coli

    Snapshot Title: Mr. E. coli
    Taken by: Callan Bentley

    Image: Veach Gap Anticline 1
    Image Owner: Alan Pitts



    Description:

    in his little anticline house.



  31. Dropstone

    Snapshot Title: Dropstone
    Taken by: Callan Bentley

    Image: Konnarock Formation as Cautionary Tale 2
    Image Owner: Robin Rohrback-Schiavone



    Description:

    The only one in this layer...



  32. Pyrite

    Snapshot Title: Pyrite
    Taken by: Callan Bentley

    Image: Sand from Paphos, Cyprus
    Image Owner: Robin Rohrback-Schiavone



    Description:

    cubic grain



  33. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Sand from Halls Lake, Ontario, Canada
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Nice



  34. Lithic clast?

    Snapshot Title: Lithic clast?
    Taken by: Callan Bentley

    Image: Ignimbrite thin section
    Image Owner: Ian Butler



    Description:

    Seems like this could be a poly-crystal aggregate that preceded eruption?



  35. Interesting contrast / comparison

    Snapshot Title: Interesting contrast / comparison
    Taken by: Callan Bentley

    Image: WV Rt 55 Whipcove Anticline
    Image Owner: Alan Pitts



    Description:

    between weathering 'style' of the outcrop and the clast size of the sediment that is building up in the small "mini-talus" slopes at the base of the cliff.



  36. More snapshots

    Snapshot Title: More snapshots
    Taken by: Callan Bentley

    Image: WV Rt 55 Whipcove Anticline
    Image Owner: Alan Pitts



    Description:

    about hinges and wrinkles



  37. Synform hinge

    Snapshot Title: Synform hinge
    Taken by: Callan Bentley

    Image: WV Rt 55 Whipcove Anticline
    Image Owner: Alan Pitts



    Description:

    appears to be here. A good place to measure the limbs' strike and dip and then use a stereonet to determine the trend and plunge of the hinge line.



  38. Interesting

    Snapshot Title: Interesting
    Taken by: Callan Bentley

    Image: WV Rt 55 Whipcove Anticline
    Image Owner: Alan Pitts



    Description:

    that the same strata are yellow at the top and gray at the bottom.



  39. One way

    Snapshot Title: One way
    Taken by: Callan Bentley

    Image: WV new Route 55 Folded Tonoloway
    Image Owner: Alan Pitts



    Description:

    GigaPan is the only way.



  40. Rhythmic bedding

    Snapshot Title: Rhythmic bedding
    Taken by: Callan Bentley

    Image: WV new Route 55 Folded Tonoloway
    Image Owner: Alan Pitts



    Description:

    Gray, yellow, brown - seems to be a repeating pattern. What does this mean?



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