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