Tuesday, February 2nd, 1999
Announcements: none

Lecture notes:

I. Hawaii
 
    A. Volcano morphology (shape)
 
            1. Close to flat, very low slope

             2. Lava can flow easily; hot spot related volcanoes

    B. Volcanic products
 
            1. 99+% basalt

II. Related topics

    A. Main vs. secondary convective system

        1. Main is convection throughout the entire mantle

        2. Secondary convective system (core-cooling) is one linear jet (hot spot)

    B. Linear chain of volcanoes

    C. Age progression easier to predict

    D. Tectonic processing happens at km/million yr. (cm/yr.)

   III. Review

       A. Hot spot - very small, cylindrical, thin jet of very hot material; melted mantle from core/mantle boundary; by-pass
            big circulation; hot spots leave a trail that we can go back and see how much the Pacific Plate has moved