8th Science

5 January 1999

Class Notes

OCEANOGRAPHY

Pangea - Super Contintent

Convergence - Come together

Divergence - Moving apart

Wilson's Cycle - Stages of ocean development

Geostation Plotting - Charts movements of Earth's countries/continents

Atlantic Ocean - Area of divergence

Pacific Ocean - Area of convergence

 

WILSON CYCLE

  1. Embroyonic Stage

    2. Beginning

    Land rifts form (uplift)

    (Remember the sheet of paper (shown in class) slowly being pushed together, forming a rise).

    Convergence takes place

  2. Juvenile Stage

    3. Seas form

    Divergence (seas being created into an ocean due to divergence; moving continents further apart (Plate tectonics)

  3. Mature Stage

    4. Sea becomes an ocean

    Divergence

    (example: Atlantic Ocean)

  4. Declining Stage

    5. Convergence

    (example: Pacific Ocean)

    Islands form on parameter of ocean

    (Pacific Ocean is mature and is a declining stage)

  5. Terminal Stage

    6. Ocean dies and becomes a sea

    (North America moves over and creates a sea)

    Convergence

    (Uplift occurs)

  6. Suturing Stage

Sea is gone

Convergence

Mountains form

(After uplift, land joined back together)

 

Before Continental Drift, there were only 2 major oceans, now there are 4.