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Geosciences LibreTexts

2.4: Activity 2; Motion Under the Ocean, Hot Spots

  • Page ID
    14923
  • Activity 2

    NOTE: For this assignment, you will need to record your work on a word processing document. Please submitted in Pages, Word (.doc), or PDF (.pdf) format so I can open it. Also, this doesn't have to be long. What I want is the figures I mention and some text to go with them that describes what you did and what you concluded. If we were in a classroom together I imagine this would be like an in-class or in-lab exercise, meaning I'm expecting you could do a reasonable job in an hour or two, depending on your reading speed and any prior experience with Google Earth.

    Directions

    1. First, read this short paper. It's important background for mid-ocean ridges and the bathymetry around them:
    2. Download Google Earth(link is external) and spend enough time with it to make an image of the ocean floor. In particular, look at the bathymetry around a mid-ocean ridge spreading center. Paste your image into a word processing document as noted above. Note that you should look at parts 3 and 4 before you complete this.
    3. In your document, comment briefly on how seafloor depth and morphology varies with increasing distance from a mid-ocean ridge spreading center. For example, I'm hoping you'll produce an image in part 1 that will tie-in with the article noted above. (Can you find some of the features they discuss? If you can, describe where they are. If not, or if you aren't sure, think about any differences in our ability to image the sea floor now versus when the paper in part 1 was written.) Think big, don't limit yourself to a few km from the spreading ridge; consider seafloor morphology at the scale of an entire ocean basin, like this example image of the Ocean Basin.
    4. Look at the Crustal Age(link is external) Poster(link is external) from NOAA. Download the image, take a screen shot, or use another approach to make a map of the ocean floor showing seafloor age. Add one or two other features to your map, and describe in a few sentences whether you could use a Web site like this in one of your classes. Paste your images into the word processing doc along with your comments.
    5. Save your document as either a text, Pages, Microsoft Word, or PDF file in the following format:

      L2_activity2_AccessAccountID_LastName.doc (or .pdf).

      For example, student Elvis Aaron Presley's file would be named "L2_activity2_eap1_presley.doc"—this naming convention is important, as it will help me make sure I match each submission up with the right student!

    Submitting your work

    Upload your document to the "Lesson 2 - Activity 2" dropbox in Canvas (see Dropboxes folder under the Assignments tab) by the due date indicated on our Course Schedule.

    Grading criteria

    See the grading rubric for specifics on how this assignment will be graded.

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