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Callan Bentley's Snapshots

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  1. Garnet

    Snapshot Title: Garnet
    Taken by: Callan Bentley

    Image: Littleton Formation Schist from Mt. Washington, NH
    Image Owner: Robin Rohrback



    Description:

    Rather petite, next to the pseudoandalusites.



  2. Ripple?

    Snapshot Title: Ripple?
    Taken by: Callan Bentley

    Image: Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    check out the 3D variation in thickness of this sand bed. Is this a preserved ripple crest?



  3. Sandstone vs. shale

    Snapshot Title: Sandstone vs. shale
    Taken by: Callan Bentley

    Image: Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    The two lithologies at this outcrop weather out differently.



  4. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation
    Image Owner: Callan Bentley



    Description:

    cm demarcations thereupon



  5. Camouflage

    Snapshot Title: Camouflage
    Taken by: Callan Bentley

    Image: Skolithos in the Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    This one is a little more subtle than the others.



  6. Bedding-parallel burrow

    Snapshot Title: Bedding-parallel burrow
    Taken by: Callan Bentley

    Image: Skolithos in the Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    Same dimensions as the rest, just a different orientation.



  7. Skolithos

    Snapshot Title: Skolithos
    Taken by: Callan Bentley

    Image: Skolithos in the Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    top of the tube



  8. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Skolithos in the Hampshire Formation
    Image Owner: Callan Bentley



    Description:

    This blue bar is 1 cm long.



  9. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: Folded strata of the Silurian Tonoloway Formation
    Image Owner: Callan Bentley



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  10. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: Tonoloway Formation Faults (Close Up), Corridor H
    Image Owner: Marissa Dudek



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  11. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: Anticline/Syncline Pair Patterson Creek Mountain Anticline WV55 North Side
    Image Owner: Alan Pitts



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  12. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

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



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  13. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: NEW new WV 55 west of Moorefield Anticline
    Image Owner: Alan Pitts



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  14. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: Anticline/Syncline Pair Patterson Creek Mountain Anticline WV55
    Image Owner: Alan Pitts



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  15. Folds

    Snapshot Title: Folds
    Taken by: Callan Bentley

    Image: Anticline/Syncline Pair Patterson Creek Mountain Anticline WV55
    Image Owner: Alan Pitts



    Description:

    Crumpled up



  16. Mud cracks

    Snapshot Title: Mud cracks
    Taken by: Callan Bentley

    Image: Tonoloway Formation, folded as part of Patterson Creek Mountain Anticline, Corridor H, West Virginia
    Image Owner: Callan Bentley



    Description:

    Many of the thinly laminated layers here show dessication cracks, as can be seen in these two samples:
    gigapan.com/gigapans/183042 and
    gigapan.com/gigapans/179411



  17. Virtual specimen

    Snapshot Title: Virtual specimen
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    A clean sample that shows a primary sedimentary structure can be seen here: gigapan.com/gigapans/182397



  18. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Buzzard Rocks
    Image Owner: Callan Bentley



    Description:

    If you were able to look down on the cross-sectioned edge of this bedding plane here, you would see something that looks like this: gigapan.com/gigapans/182397



  19. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Buzzard Rocks
    Image Owner: Callan Bentley



    Description:

    If you were able to look down on the cross-sectioned edge of this bedding plane here, you would see something that looks like this: gigapan.com/gigapans/182397



  20. Virtual sample

    Snapshot Title: Virtual sample
    Taken by: Callan Bentley

    Image: Buzzard Rocks
    Image Owner: Callan Bentley



    Description:

    Here's a sample of the Massanutten Sandstone: gigapan.com/gigapans/126687



  21. Virtual sample

    Snapshot Title: Virtual sample
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    Here's a sample of the Massanutten Sandstone: gigapan.com/gigapans/126687



  22. Massanutten Sandstone

    Snapshot Title: Massanutten Sandstone
    Taken by: Callan Bentley

    Image: Buzzard Rocks
    Image Owner: Callan Bentley



    Description:

    Here's a sample of the Massanutten Sandstone: gigapan.com/gigapans/126687



  23. Conglomerate

    Snapshot Title: Conglomerate
    Taken by: Callan Bentley

    Image: Hanging Rock Anticline, east side
    Image Owner: Callan Bentley



    Description:

    Though most of this outcrop is quartz arenite (or was, prior to metamorphism), there is also some quartz pebble conglomerate (now metaconglomerate) that represents higher-energy depositional condition...



  24. Conglomerate

    Snapshot Title: Conglomerate
    Taken by: Callan Bentley

    Image: Tuscarora Sandstone exposed at Hanging Rock Anticline, West Virginia
    Image Owner: Callan Bentley



    Description:

    Though most of this outcrop is quartz arenite (or was, prior to metamorphism), there is also some quartz pebble conglomerate (now metaconglomerate) that represents higher-energy depositional condition...



  25. Conglomerate

    Snapshot Title: Conglomerate
    Taken by: Callan Bentley

    Image: Rose Hill Formation / Tuscarora Formation contact
    Image Owner: Callan Bentley



    Description:

    Though most of this outcrop is quartz arenite (or was, prior to metamorphism), there is also some quartz pebble conglomerate (now metaconglomerate) that represents higher-energy depositional condition...



  26. Conglomerate

    Snapshot Title: Conglomerate
    Taken by: Callan Bentley

    Image: Hanging Rock Anticline, West Virginia
    Image Owner: Callan Bentley



    Description:

    Though most of this outcrop is quartz arenite (or was, prior to metamorphism), there is also some quartz pebble conglomerate (now metaconglomerate) that represents higher-energy depositional condition...



  27. Rust

    Snapshot Title: Rust
    Taken by: Callan Bentley

    Image: Rose Hill Formation / Tuscarora Formation contact
    Image Owner: Callan Bentley



    Description:

    Some of the quartzite at this site is stained by rust: gigapan.com/gigapans/183127



  28. Rust

    Snapshot Title: Rust
    Taken by: Callan Bentley

    Image: Hanging Rock Anticline, east side
    Image Owner: Callan Bentley



    Description:

    Some of the quartzite at this site is stained by rust: gigapan.com/gigapans/183127



  29. Rust

    Snapshot Title: Rust
    Taken by: Callan Bentley

    Image: Tuscarora Sandstone exposed at Hanging Rock Anticline, West Virginia
    Image Owner: Callan Bentley



    Description:

    Some of the quartzite at this site is stained by rust: gigapan.com/gigapans/183127



  30. Rust

    Snapshot Title: Rust
    Taken by: Callan Bentley

    Image: Hanging Rock Anticline, West Virginia
    Image Owner: Callan Bentley



    Description:

    Some of the quartzite at this site is stained by rust: gigapan.com/gigapans/183127



  31. Virtual sample

    Snapshot Title: Virtual sample
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    What primary sedimentary structure can be seen a slab of this rock? gigapan.com/gigapans/182397



  32. A closer look

    Snapshot Title: A closer look
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    What primary sedimentary structure can be seen in a hand sample of this unit? gigapan.com/gigapans/182397



  33. Surficial deposit

    Snapshot Title: Surficial deposit
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    This little scrap appears to be a surficial deposit of hematite (rust) on the surface of the joint which makes up the front face of the specimen.



  34. Rind

    Snapshot Title: Rind
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    This edge of the sample is defined by a joint (crack), and fluids rich in iron flowed along that crack to soak into the walls of the crack, one of which is now the right edge of this specimen.



  35. Crystalline texture

    Snapshot Title: Crystalline texture
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    Quartzite here (metamorphic) rather then protolithic quartz arenite (sedimentary)



  36. Staining gradient

    Snapshot Title: Staining gradient
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    Most rust at contact / soaking front between hematite-stained and unstained quartzite.



  37. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    This thing is made of quartz grains!



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Tuscarora Formation quartzite, showing iron oxide staining
    Image Owner: Callan Bentley



    Description:

    This blue bar is 1 cm long (wide).



  39. Factory farm

    Snapshot Title: Factory farm
    Taken by: Callan Bentley

    Image: Hampshire Formation, showing channel forms in cross section
    Image Owner: Callan Bentley



    Description:

    There's a big old chicken coop complex on the other side of this hill.



  40. Migrating channel

    Snapshot Title: Migrating channel
    Taken by: Callan Bentley

    Image: Hampshire Formation, showing channel forms in cross section
    Image Owner: Callan Bentley



    Description:

    inclined alternating layers of sandstone and red shale



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