Message #175722

[Carolyn Silver]

Study Questions

   1. What is wrong with the Suess's proposal that parts of the ocean basins are underlain by lost continents (Atlantis)?
   2. We know now that there are small portions of the ocean basins underlain by continent-like crust, termed oceanic plateaus. How can this be?
   3. In your opinion, which of Wegener's lines of evidence for continental drift were the strongest? The weakest? Why?
   4. What evidence did seismologists have that the mantle was not truly a fluid (hint: how do we know that the outer core is liquid?)?
   5. What do we now know about the rheological (deformational) properties of mantle that would have resolved some of the controversies of the 1920s - 1930s?