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ESS102H1 (104)
Lecture

Plate Tectonics

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Department
Earth Sciences
Course
ESS102H1
Professor
Charly Bank
Semester
Winter

Description
Monday January 1612Introductory GeologyC BanksPlate TectonicsExperiment Density and IsostasyIce cube placed in beaker of waterWhen melted will the volume changeNoVile of water with various liquids poured in consecutivelyLiquids order themselves by density no matter the order poured inIsostacymaterial will sink into a liquidNo matter how ice melts the same fraction will sit abovebelow the waterPlanet EarthContinents on average are 300m highHave mountain belts and shelf marks boundariesOceans on average are 4m deep mid ocean ridges are very deep 10km volcanic island chain plateausPlate BoundariesEarths surface is broken into platesLocation of volcanoesmost line up like pearls on a stringLocations of earthquakesline up even betterDivergent plate boundarieswhen two plates divergeAs plates separate earth rises and attaches to platesPlate also called lithosphere Below the plate is the asthenosphereWhen plates separate water fills gap to
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