Chapter 14 Plate Tectonics. Continental Drift Theory 1. Fit like a jigsaw 2. Matching fossils 3. Tropical plant fossils in Polar regions. Drift explained.

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Presentation transcript:

Chapter 14 Plate Tectonics

Continental Drift Theory 1. Fit like a jigsaw 2. Matching fossils 3. Tropical plant fossils in Polar regions. Drift explained climate changes – Coal

Skeptics: How did the plates move? Bathymetric measurements Cable Sonar 1947: thin ocean floor? – 4 billion yrs old – Basalt rock – Mid ocean ridge Mid ocean ridge Continental Drift Theory

How did they move? Convection – Divergent – Convergent Subduction – Transform Transform

Plate Boundaries Earthquakes Volcanoes