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Lecture10 platetectonics
1.
Plate Tectonics Tectonic
Plates of the Earth
2.
3.
4.
5.
6.
Evidence against fixed
continents Matching edges Matching geology
7.
Bathymetry of the
ocean floor continental shelf abyssal plain trench mid ocean ridge
8.
Thickness of the
Sediment x 550 m x 102 m x 18 m x 112 m x 430 m 35 m x
9.
The Driving Mechanism
10.
Paleomagnetism
11.
Radiometric dating Red
= younger, green = older
12.
13.
14.
15.
Making crust +
destroying crust = conveyor belt system = rock cycle (sort of) Convection or Buoyancy Ridge push Slab pull Convection cell in mantle
16.
Where are ridges
& trenches? ridges trenches
17.
Geologic Excitement at
Tectonic Plate Boundaries
18.
Global Seismicity
19.
Active Volcanoes
20.
21.
22.
23.
24.
25.
Convergent boundaries
Oceanic -Continental Oceanic-Oceanic Continental-Continental
26.
27.
Continental Drift Animation
based on paleomaps from University of Texas Arlington http://www.ucmp.berkeley.edu/geology/anim1.html
28.
Plate tectonics:
predicting the future
29.
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