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Snapshots

  1. Rip-ups

    Snapshot Title: Rip-ups
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback-Schiavone



    Description:

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



  2. O2

    Snapshot Title: O2
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback-Schiavone



    Description:

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



  3. Crossbeds

    Snapshot Title: Crossbeds
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback-Schiavone



    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...



  4. Mudchips & crossbeds

    Snapshot Title: Mudchips & crossbeds
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback-Schiavone



    Description:

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



  5. 1 cm

    Snapshot Title: 1 cm
    Taken by: Callan Bentley

    Image: Grinnell Formation Quartzite
    Image Owner: Robin Rohrback-Schiavone



    Description:

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