Chapter 18-Plate Tectonics

 continental drift

 Alfred Wegener- founder of continental drift

early evidence: summary of early evidence

    fit of continents

    fit of mountain ranges

    fit of faults

    fit of lines of ore deposits

    fit of glacial deposits

    fit of coal deposits

    fit of fossils- fossil correlations
                            Glossopteris and other fossils
                            photos of Glossopteris

    fit of layers of rock- rock sequences

new evidence: summary of new evidence

    seafloor spreading- Harry Hess proposes seafloor spreading-1960

    magnetic anomalies- full lecture on magnetic anomalies and reversals
                                            simple diagram explaining magnetic anomalies
                                            East Pacific magnetic anomalies
                                            ages of magnetic anomalies

    magnetic reversals- magnetic reversals and rock magnetism
                                          magnetic reversals recorded on the seafloor

    seafloor topography- spreading ridge system

    thickness of seafloor sediments

    radioactive age dating- radioactive age dating used to confirm magnetic reversals

    world-wide distribution pattern of earthquakes- earthquakes outline edges of plates 

    Mid-Atlantic Ridge and Iceland- relationship between Iceland and the Mid-Atlantic ridge

    photography of spreading ridges

plate tectonics

    overview lectures- plate tectonics diagrams

    convection- convection, the driving force

    tectonic plates- names of plates
                                  animation of plate movement*

plate margins  overview of different types of plate margins
                                plate boundaries

 divergent boundaries

    spreading ridge- cross-sectional view

    spreading continents- satellite view of the Red Sea
                                               Rio Grande rift map
                                               Baja California rift map
                                               East African rift valley

 convergent boundaries- overview

    subduction (Benioff) zone- subduction zones and trenches
                                                        Japanese Benioff zone

    oceanic crust

    continental crust 

    colliding continents- examples

    trench

    partial melting

    island arcs- island arc cross-section
                           island arc formation

transform boundaries- overview diagram
                                            transform faults associated with spreading ridges

    San Andreas fault- satellite view of San Andreas fault

hot spot

    mantle plume- hot spots are mantle plumes

    Hawaii -topographic map of the Hawaiian hot spot trace
   
   Yellowstone Hot Spot- trace of the movement of the Yellowstone hot spot