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Callan Bentley's Snapshots

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  1. Contact

    Snapshot Title: Contact
    Taken by: Callan Bentley

    Image: Metamorphic rocks and granite exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    Schist/gneiss meets granite.



  2. Lens cap

    Snapshot Title: Lens cap
    Taken by: Callan Bentley

    Image: Metamorphic rocks and granite exposed along the shore of Cabbage Island, Maine
    Image Owner: Callan Bentley



    Description:

    (to provide a sense of scale)



  3. Snails

    Snapshot Title: Snails
    Taken by: Callan Bentley

    Image: Coastal ecology, West Boothbay Harbor, Maine
    Image Owner: Callan Bentley



    Description:

    Hunkering down until high tide comes back.



  4. Kelp float

    Snapshot Title: Kelp float
    Taken by: Callan Bentley

    Image: Coastal ecology, West Boothbay Harbor, Maine
    Image Owner: Callan Bentley



    Description:

    Seaweed.



  5. Geology

    Snapshot Title: Geology
    Taken by: Callan Bentley

    Image: West Boothbay Harbor, Maine
    Image Owner: Callan Bentley



    Description:

    Schist with intercalated granite pegmatite sills, folded and dismembered (boudinaged) during Devonian mountain-building.



  6. Tide?

    Snapshot Title: Tide?
    Taken by: Callan Bentley

    Image: West Boothbay Harbor, Maine
    Image Owner: Callan Bentley



    Description:

    What can you infer about the tide from what you observe in this snapshot? (high? low? ebbing? rising?)



  7. Osprey in nest

    Snapshot Title: Osprey in nest
    Taken by: Callan Bentley

    Image: West Boothbay Harbor, Maine
    Image Owner: Callan Bentley



    Description:

    Osprey incubating eggs.



  8. Fold hinge

    Snapshot Title: Fold hinge
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    Dismembered due to boudinage



  9. better boudinage

    Snapshot Title: better boudinage
    Taken by: Callan Bentley

    Image: Geology of Pemaquid Point, Maine (east)
    Image Owner: eos101



    Description:

    To have a closer look at the boudinage here, check out this GigaPan: www.gigapan.com/gigapans/157549



  10. Pen for scale

    Snapshot Title: Pen for scale
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    This red pen serves as a sense of scale.



  11. Another view

    Snapshot Title: Another view
    Taken by: Callan Bentley

    Image: Geology of Pemaquid Point, Maine (west)
    Image Owner: eos101



    Description:

    To see a GigaPan from this point, looking toward the lighthouse: www.gigapan.com/gigapans/157527



  12. Boudin

    Snapshot Title: Boudin
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    A boudin from a stretched granite dike.



  13. Pen for scale

    Snapshot Title: Pen for scale
    Taken by: Callan Bentley

    Image: Pemaquid Point, Maine
    Image Owner: Callan Bentley



    Description:

    This red ballpoint pen serves as a sense of scale.



  14. Graded bed

    Snapshot Title: Graded bed
    Taken by: Callan Bentley

    Image: Graded Slate & Graywacke Beds
    Image Owner: Brian Allison



    Description:

    Awesome outcrop; thanks for GigaPanning it!



  15. Contact between beds

    Snapshot Title: Contact between beds
    Taken by: Callan Bentley

    Image: Graded Bedding in the Martinsburg Formation
    Image Owner: Robin Rohrback



    Description:

    The fine grained dark gray material below is the top of one graded bed. The sudden, crisp transition to coarse, light-colored sand marks the bottom of the overlying graded bed.



  16. Flame structures

    Snapshot Title: Flame structures
    Taken by: Callan Bentley

    Image: Graded Bedding in the Martinsburg Formation
    Image Owner: Robin Rohrback



    Description:

    Loading structures



  17. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Graded Bedding in the Martinsburg Formation
    Image Owner: Robin Rohrback



    Description:

    1 cm



  18. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Giant Fusulinids
    Image Owner: Robin Rohrback



    Description:

    This blue bar is 1 cm across.



  19. Schwagerina, a fusilinid foram

    Snapshot Title: Schwagerina, a fusilinid foram
    Taken by: Callan Bentley

    Image: Giant Fusulinids
    Image Owner: Robin Rohrback



    Description:

    Cross-sectioned, with overall spiral shape and internal subdivisions visible.



  20. Cribratina

    Snapshot Title: Cribratina
    Taken by: Callan Bentley

    Image: Cribratina duo
    Image Owner: Callan Bentley



    Description:

    This foram is an index fossil for the Albian age.



  21. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Cribratina duo
    Image Owner: Callan Bentley



    Description:

    This blue bar is 1 cm long.



  22. Trilobite shell

    Snapshot Title: Trilobite shell
    Taken by: Callan Bentley

    Image: Storm deposit in Reedsville Formation
    Image Owner: Callan Bentley



    Description:

    in cross-section



  23. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Storm deposit in Reedsville Formation
    Image Owner: Callan Bentley



    Description:

    This blue box is a 1 cm long scale bar.



  24. Cave

    Snapshot Title: Cave
    Taken by: Callan Bentley

    Image: Conococheague Formation exposed near Mulberry Run, Virginia
    Image Owner: Callan Bentley



    Description:

    Little cave, spewing red clay



  25. stromatolite

    Snapshot Title: stromatolite
    Taken by: Callan Bentley

    Image: Conococheague Formation exposed near Mulberry Run, Virginia
    Image Owner: Callan Bentley



    Description:

    algal mound



  26. Pen for scale

    Snapshot Title: Pen for scale
    Taken by: Callan Bentley

    Image: Conococheague Formation exposed near Mulberry Run, Virginia
    Image Owner: Callan Bentley



    Description:

    A typical ballpoint pen, to help you calibrate your sense of scale.



  27. Rip-ups

    Snapshot Title: Rip-ups
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback



    Description:

    What do these mud-chip rip-up clasts suggest about the depositional energy (current strength) at this site over time?



  28. O2

    Snapshot Title: O2
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback



    Description:

    Were these sediments deposited under oxygenated or anoxic conditions? What evidence supports your conclusion?



  29. Crossbeds

    Snapshot Title: Crossbeds
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback



    Description:

    Is the sample right-side-up or up-side-down? How do you know? Which way was the sediment-depositing current flowing when these grains were laid down? What evidence would you cite in support of your in...



  30. Mudchips & crossbeds

    Snapshot Title: Mudchips & crossbeds
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback



    Description:

    Which way was the current flowing? How had the depositional energy changed?



  31. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback



    Description:

    This scale bar conveys a sense of how big the rock sample is. The blue bars are each 1 centimeter wide.



  32. Sutured grain boundary

    Snapshot Title: Sutured grain boundary
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Evidence of pressure solution



  33. 120 degree fractures

    Snapshot Title: 120 degree fractures
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Some of the pebbles are cracked due to bedding-perpendicular loading and bedding-parallel extension. σ1 > σ2 = σ3



  34. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This bar serves as a sense of scale.



  35. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    This pencil serves as a sense of scale. The black bars along its side are each 1 cm in length.



  36. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    This pencil serves as a sense of scale. The black bars along its side are 1 cm in length each.



  37. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Massanutten Sandstone
    Image Owner: Callan Bentley



    Description:

    This pencil serves as a sense of scale. The black bars on its side are each 1 cm long.



  38. Blocky "needles"

    Snapshot Title: Blocky "needles"
    Taken by: Callan Bentley

    Image: Stylolite in Helderberg Group limestone, West Virginia
    Image Owner: Callan Bentley



    Description:

    Stylolitic surface in detail. Note apparent accumulation of clay (pelitic non-soluble material) along stylolite surface.



  39. Stylolite "needle"

    Snapshot Title: Stylolite "needle"
    Taken by: Callan Bentley

    Image: Stylolite in Helderberg Group limestone, West Virginia
    Image Owner: Callan Bentley



    Description:

    Rock has dissolved along this surface, causing interpenetration of the two strata.



  40. Fossil

    Snapshot Title: Fossil
    Taken by: Callan Bentley

    Image: Stylolite in Helderberg Group limestone, West Virginia
    Image Owner: Callan Bentley



    Description:

    Shelly material



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