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Callan Bentley's Snapshots

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  1. Truncation

    Snapshot Title: Truncation
    Taken by: Callan Bentley

    Image: Ghaub Formation diamictite with Snowball Earth glacial dropstones
    Image Owner: Callan Bentley



    Description:

    The dropstone pierced through this central layer, resulting in a truncating relationship between that layer and the dropstone at left.



  2. Compaction of sediments

    Snapshot Title: Compaction of sediments
    Taken by: Callan Bentley

    Image: Ghaub Formation diamictite with Snowball Earth glacial dropstones
    Image Owner: Callan Bentley



    Description:

    As the piercing dropstone impaced these fine-grained carbonate mud sediments, they squished downward and out of the way.



  3. Observers

    Snapshot Title: Observers
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    on the Virginia side.



  4. Quartz vein

    Snapshot Title: Quartz vein
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    This area hosts 2 generations of quartz veins - an older set which were folded and boudinaged during 460 Ma Taconian mountain-building, and a younger (post-Taconian) set, which are gold-bearing. This ...



  5. Cooler

    Snapshot Title: Cooler
    Taken by: Callan Bentley

    Image: Potomac Great Falls
    Image Owner: Alexander Shumakovitch



    Description:

    Flood debris? Or is someone fishing over there?



  6. Bluish gleam

    Snapshot Title: Bluish gleam
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    a sublty blue iridescent luster



  7. Crenulations

    Snapshot Title: Crenulations
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    Slight wrinkles disrupt the plane of foliation.



  8. Purplish iridescence

    Snapshot Title: Purplish iridescence
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    A neat purple/blue sheen can be seen on some of these crystals.



  9. Trio

    Snapshot Title: Trio
    Taken by: Callan Bentley

    Image: Magnetite muscovite schist from Thoroughfare Gap
    Image Owner: Callan Bentley



    Description:

    magnetite porphyroblasts



  10. South Fork

    Snapshot Title: South Fork
    Taken by: Callan Bentley

    Image: Gooney Run Overlook, Shenandoah National Park
    Image Owner: Alan Pitts



    Description:

    of the Shenandoah River - entrenched meanders



  11. Fused grains

    Snapshot Title: Fused grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    getting all buddy-buddy with their neighbors



  12. More sutured grains

    Snapshot Title: More sutured grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    with a preferred alignment



  13. Little black grain

    Snapshot Title: Little black grain
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Interesting. Who's this little fellow?



  14. Insect egg cases?

    Snapshot Title: Insect egg cases?
    Taken by: Callan Bentley

    Image: Oriskany Fishing Hole
    Image Owner: Alan Pitts



    Description:

    Is that what these little barnacle-shaped things are?



  15. Earbuds

    Snapshot Title: Earbuds
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Looks like he's listening to music?



  16. Rust-covered joint surface

    Snapshot Title: Rust-covered joint surface
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Slightly oblique to the plane of the outcrop, steeply dipping.



  17. Kink fold, interrupted

    Snapshot Title: Kink fold, interrupted
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Low angle, small-offset fractures dipping to the left.



  18. Shelf fungus

    Snapshot Title: Shelf fungus
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Off on a tree



  19. Tension fractures galore

    Snapshot Title: Tension fractures galore
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Must have been a very stressed-out area



  20. Cave?

    Snapshot Title: Cave?
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    Looks like it



  21. Rock hammer

    Snapshot Title: Rock hammer
    Taken by: Callan Bentley

    Image: Patterson Creek Mountain Anticline 1
    Image Owner: Alan Pitts



    Description:

    for scale



  22. Preferred alignment of grains

    Snapshot Title: Preferred alignment of grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Long axes all point to upper right.



  23. Nubbin og a quartz vein

    Snapshot Title: Nubbin og a quartz vein
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Just a tiny fragment left sticking to the edge of the sample.



  24. P sol & empty space

    Snapshot Title: P sol & empty space
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Lovely example of a stack of sutured grains running from upper left towards lower right; empty space along strike both to the upper right and lower left of that. Strain pattern here appears to broadly...



  25. Sutured grains

    Snapshot Title: Sutured grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Maximum stress oriented from upper left toward bottom right; note also the open gaps in the spaces between the grains in an upper right towards lower left direction...



  26. Rusty pancake

    Snapshot Title: Rusty pancake
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    with a dollop of quartz on top



  27. Sutured grain boundaries

    Snapshot Title: Sutured grain boundaries
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    P sol!



  28. Outsized grain

    Snapshot Title: Outsized grain
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    This thing is a pebble! Bigger than the rest of this otherwise well-sorted sample.



  29. Preferred alignment of grains

    Snapshot Title: Preferred alignment of grains
    Taken by: Callan Bentley

    Image: Strained Antietam Formation
    Image Owner: Callan Bentley



    Description:

    Perhaps due to pressure solution?



  30. Hiker

    Snapshot Title: Hiker
    Taken by: Callan Bentley

    Image: Seneca Rocks
    Image Owner: Alan Pitts



    Description:

    Headed for the hills!



  31. Sign, sign...

    Snapshot Title: Sign, sign...
    Taken by: Callan Bentley

    Image: Seneca Rocks
    Image Owner: Alan Pitts



    Description:

    ...everywhere a sign.



  32. Fishermen

    Snapshot Title: Fishermen
    Taken by: Callan Bentley

    Image: Seneca Rocks
    Image Owner: Alan Pitts



    Description:

    .



  33. Observation deck

    Snapshot Title: Observation deck
    Taken by: Callan Bentley

    Image: Seneca Rocks
    Image Owner: Alan Pitts



    Description:

    Reward for the hikers who are tough enough to get to the top, but not comfortable enough with heights to go walking out onto the upright bedding of the Rocks.



  34. Couple of vultures

    Snapshot Title: Couple of vultures
    Taken by: Callan Bentley

    Image: Seneca Rocks
    Image Owner: Alan Pitts



    Description:

    ? I think?



  35. Interesting cobble

    Snapshot Title: Interesting cobble
    Taken by: Callan Bentley

    Image: "Rocks of Virginia" garden at the DGMR
    Image Owner: Callan Bentley



    Description:

    It has stripes, and that is very important!



  36. Sample number

    Snapshot Title: Sample number
    Taken by: Callan Bentley

    Image: Coloeptera 1030b
    Image Owner: Robin Rohrback-Schiavone



    Description:

    1030B



  37. Antennae

    Snapshot Title: Antennae
    Taken by: Callan Bentley

    Image: Coloeptera 1030b
    Image Owner: Robin Rohrback-Schiavone



    Description:

    segments visible!



  38. Little abdomen

    Snapshot Title: Little abdomen
    Taken by: Callan Bentley

    Image: Coloeptera 1030b
    Image Owner: Robin Rohrback-Schiavone



    Description:

    of something...



  39. What is this critter?

    Snapshot Title: What is this critter?
    Taken by: Callan Bentley

    Image: Coloeptera 1030b
    Image Owner: Robin Rohrback-Schiavone



    Description:

    Seems to have a very big head...



  40. Bonus wasp

    Snapshot Title: Bonus wasp
    Taken by: Callan Bentley

    Image: Coloeptera 1030b
    Image Owner: Robin Rohrback-Schiavone



    Description:

    A little something extra, revealed by the GigaPan!



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