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Callan Bentley's Snapshots

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  1. Chesapecten nefrens

    Snapshot Title: Chesapecten nefrens
    Taken by: Callan Bentley

    Image: Calvert Formation, Scientists' Cliffs, Maryland (#7 of 8)
    Image Owner: Callan Bentley



    Description:

    (I think)



  2. Nautiloid

    Snapshot Title: Nautiloid
    Taken by: Callan Bentley

    Image: Fossiliferous siltstone (Martinsburg Fm??) with prolific fossils
    Image Owner: Callan Bentley



    Description:

    Straight-shelled orthocone



  3. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Fossiliferous siltstone (Martinsburg Fm??) with prolific fossils
    Image Owner: Callan Bentley



    Description:

    1 cm



  4. Sutures

    Snapshot Title: Sutures
    Taken by: Callan Bentley

    Image: Ammonoid
    Image Owner: Robin Rohrback



    Description:

    Ammonitic suture pattern. Jurassic to Cretaceous.



  5. Notebook

    Snapshot Title: Notebook
    Taken by: Callan Bentley

    Image: Bergton Thrust Fault - Greenland Gap Group
    Image Owner: Marissa Dudek



    Description:

    for scale



  6. Flat, round brachs

    Snapshot Title: Flat, round brachs
    Taken by: Callan Bentley

    Image: Brachiopod Body Fossils in the Ridgeley Sandstone, LaVale, MD
    Image Owner: Robin Rohrback



    Description:

    Strophomenids??



  7. Brachiopod

    Snapshot Title: Brachiopod
    Taken by: Callan Bentley

    Image: Brachiopod Body Fossils in the Ridgeley Sandstone, LaVale, MD
    Image Owner: Robin Rohrback



    Description:

    Spiriferid of some sort



  8. Cleavage

    Snapshot Title: Cleavage
    Taken by: Callan Bentley

    Image: Harpers Formation, Harpers Ferry, West Virginia
    Image Owner: Callan Bentley



    Description:

    Dips to the right (southeast) at 20°



  9. Bedding

    Snapshot Title: Bedding
    Taken by: Callan Bentley

    Image: Harpers Formation, Harpers Ferry, West Virginia
    Image Owner: Callan Bentley



    Description:

    Dips toward the right (southeast) at ~47°



  10. Pencil for scale

    Snapshot Title: Pencil for scale
    Taken by: Callan Bentley

    Image: Harpers Formation, Harpers Ferry, West Virginia
    Image Owner: Callan Bentley



    Description:

    1 cm black bars along its length.



  11. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Tumbling Run
    Image Owner: Callan Bentley



    Description:

    Top of the New Market; Bottom of the Lincolnshire.



  12. Dike?

    Snapshot Title: Dike?
    Taken by: Callan Bentley

    Image: Wyler Aerial Tramway
    Image Owner: Joshua Villalobos



    Description:

    Josh - this looks like a basaltic dike cutting through the Red Bluff Granite. Am I reading that right?



  13. Striations

    Snapshot Title: Striations
    Taken by: Callan Bentley

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



    Description:

    Plagioclase!



  14. Abandoned meander

    Snapshot Title: Abandoned meander
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    gorgeous



  15. Small meander cutoff

    Snapshot Title: Small meander cutoff
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    ?



  16. Levees

    Snapshot Title: Levees
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    These stream channels seem to sport a pair of levees on either bank.



  17. Terrace?

    Snapshot Title: Terrace?
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    Little mesa-like erosional remnant of former deposit.



  18. Fold hinge

    Snapshot Title: Fold hinge
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    Wow - what detail!!



  19. State fish hatchery

    Snapshot Title: State fish hatchery
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    Geometric ponds



  20. Braided channels

    Snapshot Title: Braided channels
    Taken by: Callan Bentley

    Image: LiDAR view of the Northern Fort Valley and Massanutten Mountain
    Image Owner: Callan Bentley



    Description:

    Where Passage Creek emerges from the constraints of the Massanutten ridge system.



  21. Helderberg?

    Snapshot Title: Helderberg?
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    This could be Helderberg limestone, based on the gray color and scratches.



  22. Iron oxide stained Massanutten

    Snapshot Title: Iron oxide stained Massanutten
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Some portions of the Massanutten Sandstone are very rusty.



  23. Massanutten Sandstone

    Snapshot Title: Massanutten Sandstone
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    quartz arenite - source of most of the quartz sand grains in this sample, but here's a lithic fragment.



  24. Bloomsburg

    Snapshot Title: Bloomsburg
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Classic red pebble



  25. Snail shell

    Snapshot Title: Snail shell
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Local freshwater snail, presumably - not fossil



  26. Angular quartz grain

    Snapshot Title: Angular quartz grain
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Quite distinct from the more rounded population of clasts in this sample.



  27. Mahantango
  28. Bloomsburg Formation

    Snapshot Title: Bloomsburg Formation
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Outcrop:
    gigapan.com/gigapans/168012Hand sample:
    www.gigapan.com/gigapans/163085



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Sediment from Passage Creek, Fort Valley, Virginia
    Image Owner: Callan Bentley



    Description:

    Petri dish is 9 cm in diameter



  30. Mini bomb?

    Snapshot Title: Mini bomb?
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    or a seed?



  31. Plant stuff

    Snapshot Title: Plant stuff
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    Organic debris



  32. Pele's hair

    Snapshot Title: Pele's hair
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    long strands of glass



  33. Snail shell

    Snapshot Title: Snail shell
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    Little gastropod



  34. Obsidian

    Snapshot Title: Obsidian
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    glassy sheen



  35. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Kilauea surface crevice debris
    Image Owner: Callan Bentley



    Description:

    Petri dish is 9 cm in diameter



  36. Herkimer diamond?

    Snapshot Title: Herkimer diamond?
    Taken by: Callan Bentley

    Image: Glauconite Sand
    Image Owner: Robin Rohrback



    Description:

    What's this thing?



  37. Greenland Gap

    Snapshot Title: Greenland Gap
    Taken by: Callan Bentley

    Image: Westward Facing Quarry Wall (Wide View), Corridor H
    Image Owner: Marissa Dudek



    Description:

    Quartz-sandstone-rimmed anticline defining the ridge to the east, cut into w/ Greenland Gap.



  38. Fractures = fluid flow

    Snapshot Title: Fractures = fluid flow
    Taken by: Callan Bentley

    Image: Westward Facing Quarry Wall (Wide View), Corridor H
    Image Owner: Marissa Dudek



    Description:

    Clear evidence of alteration of the rock along the sides of fracture surfaces, preferred conduits for fluid flow through the subsurface.



  39. Lungfish burrows

    Snapshot Title: Lungfish burrows
    Taken by: Callan Bentley

    Image: Hampshire Formation, Corridor H, West Virginia
    Image Owner: Marissa Dudek



    Description:

    Four of them (vertical tubes) in this snapshot.



  40. Vertical tube

    Snapshot Title: Vertical tube
    Taken by: Callan Bentley

    Image: Hampshire Formation, Corridor H, West Virginia
    Image Owner: Marissa Dudek



    Description:

    Possible lungfish burrow.



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