plate tectonics. alfred wegener (1880-1930) alfred wegener (1880-1930) the origin of continents and...
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PLATE TECTONICS
Alfred Wegener (1880-1930)
Alfred Wegener (1880-1930)
The Origin of Continents and Oceans (1915)
I. Continental Drift
Pangea: “all lands”
I. Continental Drift
A. Fit of the Continents
Fit of the Continents
I. Continental Drift
A. Fit of the Continents
B. Fossil Evidence
I. Continental Drift
A. Fit of the Continents
B. Fossil Evidence
C. Rock Types
I. Continental Drift
A. Fit of the Continents
B. Fossil Evidence
C. Rock Types
D. Paleoclimate Evidence
PLATE TECTONICS
I. Continental DriftAlfred Wegner (1915)
A. Fit of the ContinentsB. Fossil EvidenceC. Rock TypesD. Paleoclimate Evidence
WHAT IS MISSING………?
II. Mounting Evidence of Contin. Drift
A. Earth’s magnetic field
A. Earth’s magnetic field
B. Polar Wandering (S.K. Runcorn, 1950)
II. Mounting Evidence of Contin. Drift
A. Earth’s magnetic field
B. Polar Wandering (S.K. Runcorn, 1950)
C. Sea Floor Spreading (Harry Hess, 1960)
Sea floor spreading
II. Mounting Evidence of Contin. Drift
A. Earth’s magnetic field
B. Polar Wandering (S.K. Runcorn, 1950)
C. Sea Floor Spreading (Harry Hess, 1960)
D. Geomagnetic Reversals
Geomagnetic Reversals
video
III. Plate Tectonics
III. Plate Tectonics
A. Concept: an assimilation of the ideas of Wegner (continental drift) with sea floor spreading and geomagnetics
III. Plate Tectonics
A. Concept: an assimilation of the ideas of Wegner (continental drift) with sea floor spreading and geomagnetics
B. Plate Boundaries
The Wilson Cycle
III. Plate Tectonics
A. Plate Boundaries
1. Divergent
Hot Spot and Triple Junctions
A divergent boundary…..
A divergent boundary…..
animation
A modern-day divergent boundary…..
III. Plate Tectonics
A. Plate Boundaries
1. Divergent
2. Convergent
a. oceanic-oceanic
Converging boundary…..Oceanic-Oceanic
animation
Converging boundary…..
III. Plate Tectonics
A. Plate Boundaries
1. Divergent
2. Convergent
a. oceanic-oceanic
b. oceanic-continental
Converging boundary…..Continental-Oceanic
animation
Converging boundary…..
III. Plate Tectonics
A. Plate Boundaries
1. Divergent
2. Convergent
a. oceanic-oceanic
b. oceanic-continental
c. continental-continental
Converging boundary…..Continental-Continental
animation
animation
Transform boundary…..
III. Plate Tectonics
A. Plate Boundaries
1. Divergent
2. Convergent
a. oceanic-oceanic
b. oceanic-continental
c. continental-continental
3. Transform
Transform boundary…..
Transform boundary…..
animation
III. Plate Tectonics
A. Plate Boundaries1. Divergent2. Convergent
a. oceanic-oceanicb. oceanic-continentalc. continental-continental
3. Transform4. Other (hotspots)
Hot Spots…..
animation