Plate Tectonics: The Grand Unifying Theory of Geology

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Convergent Boundaries • Volcanic arc – Volcanic belt on an overriding plate. – The descending plate contains fluids, squeezed out at ~ 150 km depth. Causes the overlying plate to partially melt. – Magmas burn upward, fueling volcanic eruptions. – A curved Earth dictates that volcanic belts are curved. • Arc type depends on overriding plate. – Continental crust – Continental arc. – Oceanic – Island arc.
The Wadati-Benioff Zone • How do we know where the subducting plate is? • Mega Thrust Earthquakes occur along the interface between the upper and lower plate • The pattern of earthquakes outlines the location and shape of the lower plate • The deepest and largest earthquakes in the world occur at subduction zones • What is the fate of the sinking plate?
Page 1 and 2: Plate Tectonics The Grand Unifying
Page 3 and 4: Elevations and Lithospheric Loading
Page 5 and 6: Why Are Continents Higher? • Cont
Page 7 and 8: Plate boundaries are zones of many
Page 9 and 10: The Major Plates of Earth’s Litho
Page 11 and 12: Type 2 - Convergent Plate Boundary
Page 13 and 14: Divergent Boundaries • Sea-floor
Page 15 and 16: New Oceanic Crust at Mid-Ocean Ridg
Page 17 and 18: Why Are Mid-Ocean Ridges Elevated?
Page 19 and 20: Pillow Pillows In The Field Pillow
Page 21 and 22: Convergent Plate Boundaries: Subduc
Page 23: Convergent Boundaries • Accretion
Page 27 and 28: Subduction and Island Arcs Island A
Page 29 and 30: Transform Boundaries • Lithospher
Page 31 and 32: Transform Plate Boundaries - No Net
Page 33 and 34: SAF Aerial View
Page 35 and 36: Hot Spots • Not all volcanoes on
Page 37 and 38: The orientation of the Hawaiian arc
Page 40 and 41: The Birth of a Divergent boundary
Page 42 and 43: • The western U.S. - most of Neva
Page 44 and 45: What Drives Plate Motions? • The
Page 46 and 47: • Thanks to GPS and other geodeti
Page 48 and 49: Relative Plate Velocities Ignore re

Plate Tectonics: The Grand Unifying Theory of Geology

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