Main plates of the earth Chapter 2: Plate Tectonics Theory of plate tectonics “Plate Tectonics” explains why the plates of the earth are moving. The main idea (theory) was proposed by Alfred Wegener in 1912. Earth’s crust consists of plates that move or float on the mantle Movement is ...
Chapter 9.2 Plate Tectonics Earth’s Major Plates Remember the lithosphere is the upper part of the mantle and crust, it is strong and rigid. The asthenosphere is right below and it is a weaker region. The lithosphere is divided into segments called plates, which move and change shape and s...
The Theory of Plate Tectonics The Theory of Plate Tectonics The Theory of Plate Tectonics The Theory of Plate Tectonics The Theory of Plate Tectonics Tectonic Plate Boundaries Tectonic Plate Boundaries Convergent Boundaries Convergent Boundaries Convergent Boundaries Tectonic Plate Boundaries Divergent Boundary...
1第二讲Plate Tectonics2prefaceoThe significance 板块构造的科学意义板块构造的科学意义oThe plate tectonics notion has profoundly changed the wa
2-第二讲--Plate---Tectonics--1PPT优秀课件 第二讲PlateTectonics 1 preface Thesignificance板块构造的科学意义Theplatetectonicsnotionhas profoundlychangedthewayweviewtheearth.Intheearly1960s,theemergence（出现）ofthetheoryofplatetectonicsstartedarevolutionintheearthsciences.Theplatetectonicstheoryistheresultofthe...
PLATE TECTONICS and OCEANS FAU Geoscience板块构造与海洋地球科学系.ppt,* * * Mid-Ocean Ridges (MOR) Characterized by: Rift valleys Heat flow Age of ridge * MOR Dimensions Exceed 70,000 kilometers in length Cover 20% of earth’s surface Typical height is
板块构造 Plate Tectonics Canada’sGeologicHistory Introduction Cross-sectionofEarth TheEarth’ssurfaceisathinlayerofmovingplates,floatingonmorefluidlayersofmoltenrocksurroundingtheEarth’score.•About300millionyearsago(MYA),theplateswereonelargeplateorsupercontinentcalledPangaea.•Overmillionsofyears,theplates...
7.Catastrophicphenomenarelatedtoplatetectonics 有關板塊構造的災難性現象(P18-19)1.StructureoftheEarth地球的構造 1.Core地核:•thehighestdensity:密度非常高Veryhigh•temperature溫度非常高：>3500℃ 2.)Mantle地幔 •Lower下部:solid固態•upper上部:liquid液態(nearcrust近地殼)•semi-plasticstate半膠狀態...
(1912)DieEntstehungDer KontinenteUndOzeane 1.Howweknowplatetectonicshappens ThePermian IceAge Problem 1.Howweknowplatetectonicshappens Wegener’s Theory 1.Howweknowplatetectonicshappens Dating the Breakup 1.Howweknowplatetectonicshappens FrankTaylor •Insomerespects, Taylor’sideas weremore modernthan ...
What is Plate Tectonics The Earth’s crust and upper mantle are broken into sections called plates Plates move around on top of the mantle like rafts What is the Lithosphere? The crust and part of the upper mantle = lithosphere 100 km thick Less dense than the material below it so it “...