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Chapter 3 Plate Tectonics

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Title: Chapter 3 Plate Tectonics


1
Chapter 3 Plate Tectonics
2
Active Tectonic Regimes
Pacific Northwest
Tibet
South America
Japan
Arabian Peninsula
South Atlantic
3
The Pacific Northwest
Juan de Fuca Ridge
Step
4
South America is lopsided
Andes
Oceanic trench
Continental shelf
Amazon Basin
5
South Atlantic Ocean
Ridge
Zigzags
Fracture zones
6
The Tibetan Plateau
Tibetan Plateau
India
7
Japan
Curving Ridges
Japan
Deep Oceanic trenches
8
The Arabian Peninsula
Persian Gulf
Peninsula
Red Sea
Gulf of Aden
9
Prominent features on Earths surface
fracture zones
Continental shelves
Plateaus
island arcs
Linear island chains
Continents
Deep ocean trenches
Mid-ocean ridges
Oceanic plateaus
10
Where do Most Earthquakes Occur?
11
Distribution of Volcanoes
12
Elevation
13
Distribution of earthquakes (yellow), volcanoes
(orange), and high elevations (brown)
Tectonic Activity
Tectonic plates
14
How Do Plates Move Relative to One Another?
Divergent Boundary
15
Convergent Boundary
16
Transform Boundary
17
Location of the three types of Plate Boundaries
18
Divergent Boundaries (Mid Oceanic Ridges)
Mid-Atlantic Ridge
seafloor spreading
19
Mid-Ocean Ridges
rift
Magma erupts or solidifies at depth forms new
oceanic crust
Asthenosphere rises and melts
20
Divergent Boundary (Continental Rifts)
Uplift
Pulled Apart
Faulting
Rifting
Ocean basin
Seafloor Spreading
21
Convergent Boundary (Ocean-Ocean )
Trench
Island Arc
Accretionary Prism
Water initiates melting
22
Convergent Boundary (Ocean-Continent )
Trench
mantle melt
Oceanic plate subducting beneath continent
23
Pacific Ring of Fire
24
Pacific Ring of Fire
Continental plate
Oceanic plate
Oceanic plate
03.05.c2
Formation of island arcs
mountain belts with volcanoes
25
Continent-Continent Convergence
Subduction of oceanic plate
Continents collide
26
Continental collision
27
Transform Boundary
28
Transform Boundary
29
Mid-Atlantic Ridge
30
N American West Coast
31
What Moves the Plates?
Ridge push
Slab pull
Other forces, such as convection in mantle
32
Relative Plate Movement
Plates move cm/year
33
Plate Tectonics and The Age of The Seafloor
34
Formation of Linear Island Chains
Volcano
Volcanism shuts off as area moves away
hot spot
Linear Island Chains
35
Examples of Linear Chains
Africa
Hawaii
03.08.c
Pacific Ocean
Atlantic Ocean
36
What is the present setting of S America?
37
Cross-section of South America
38
Evolution of South America
Middle Mesozoic(140 m.y ago)
Late Mesozoic(100 m.y ago)
Present
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