Plate tectonics

Plate Tectonics Continental Drift

4-1 Continental Drift – objectives… ,[object Object],[object Object],[object Object]

Continental Drift ,[object Object],[object Object]

Hypothesis on Continental Drift. ,[object Object],[object Object],[object Object],[object Object]

Alfred Wegener ,[object Object],[object Object]

Observations led to questions… ,[object Object],[object Object],[object Object]

Evidence ,[object Object],[object Object],[object Object],[object Object],[object Object]

Geologic Evidence ,[object Object],[object Object],[object Object]

Climatic Evidence ,[object Object],[object Object],[object Object]

Climatic Evidence - glaciation ,[object Object]

There was little support for Wegner’s hypothesis….until.two decades after his death…

Seafloor Spreading ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Seafloor Spreading ,[object Object],[object Object]

Paleomagnetism ,[object Object],[object Object],[object Object]

Review of 4-1… ,[object Object],[object Object],[object Object],[object Object]

4-2 – Plate Tectonics - objectives ,[object Object],[object Object],[object Object],[object Object]

A theory emerges… ,[object Object],[object Object],[object Object]

The Earth’s Layers ,[object Object],[object Object],[object Object],[object Object],Himilayian Crust

The Earth’s Layers ,[object Object],[object Object],[object Object],[object Object]

Lithospheric Plate Boundaries ,[object Object],[object Object]

Divergent Boundaries ,[object Object]

Convergent Boundaries ,[object Object],[object Object],[object Object],[object Object]

Convergent Boundary - Collision ,[object Object]

Convergent Boundaries ,[object Object]

Transform Fault Boundaries ,[object Object]

Causes of Plate Motion ,[object Object]

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