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Plate Tectonics - Lesson 4 - Part 1 of 8

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  • Description: Series made in 1976 - Understanding the Earth by TV Ontario

    The series host was Dr. David Pearson a renowned English trained, Canadian geologist residing in Sudbury, Ontario.

    Dr. David Pearson lectured at Laurentian University in Sudbury, Ontario. This series was part of a extension course at Laurentian, i believe from 1976 to 1986.

    Planet of Man Series -- Jigsaw Fit (30minutes)
    Host; Tuzo Wilson
    Plate Tectonics - Lesson 4 - Part 1 of 8
    •Continental shift ole ideas -- like ships moving on a oceans
    •6 major plates divided into series of plates -- comprised both in land and ocean
    •Plates slide underneath, beside and overtop one another
    •Andes of South America -- Multiple ranges of north America -- Mountains of the western pacific and Indonesia -- Great Himalayan belt from Asia to western Europe.
    •Early recognition of the plates -- seismology was used to define narrow belts of earthquake activity.
    •Earthquake activity followed the boundaries of the plate
    •Animation of a world map, illustrating the earthquake centers caught by seismological equipment
    •Also discovered all the active volcanoes were discovered along these earthquake centers
    •Development of sonar (after WWII) they could now map the ocean floor
    •What they found is huge mountain ranges, and series of very deep trenches.
    • Early 60's they discovered the mid atlantic floor they were actually spreading -- sea floor spreading
    •Thoughts -- if sea floor is spreading?..then there must be some place where the result of the spreading is ending up?... Mountain belts.
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