lecture12
Table of Contents
- Global Tectonics: Plates and Plumes
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Why study plates and their motions?
- Continental Drift
- Why study plates and their motions?
- 12.1 How does continental drift relate to plate tectonics?
- 12.1 How does continental drift relate to plate tectonics?
- 12.1 How does continental drift relate to plate tectonics?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.2 What is the evidence that plates are rigid?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- Age of Crusts
- Magnetic Record of Seafloors
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- Seismic Tomography Data
- Rift Valleys
- Forming Seas
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.3 What is the evidence that plates move apart at divergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- Seismic Tomography
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- Convergent Plate Boundaries
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.4 What is the evidence that subduction occurs at convergent plate boundaries?
- 12.5 What is the evidence that plates slide past one another at transform plate boundaries?
- Fault Displacement
- 12.5 What is the evidence that plates slide past one another at transform plate boundaries?
- 12.5 What is the evidence that plates slide past one another at transform plate boundaries?
- 12.5 What is the evidence that plates slide past one another at transform plate boundaries?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.6 What does the mantle-plume hypothesis explain that plate tectonics cannot explain?
- 12.7 How do we know ... that plates move in real time?
- 12.7 How do we know ... that plates move in real time?
- Global Plate Motion
- 12.7 How do we know ... that plates move in real time?
- 12.7 How do we know ... that plates move in real time?
- Measurements and Predictions
- 12.7 How do we know ... that plates move in real time?
- 12.7 How do we know ... that plates move in real time?
- 12.8 What forces cause plate motions and plumes?
- 12.8 What forces cause plate motions and plumes?
- 12.8 What forces cause plate motions and plumes?
- 12.8 What forces cause plate motions and plumes?
- 12.8 What forces cause plate motions and plumes?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
- 12.9 What were the consequences of plate motion over geologic time?
Text and Images from Slide
- Plate tectonics, mantle plumes, and superplumes are expressions of convection.
- Subducting lithosphere represents the downwelling process of mantle convection.
- Subducting plates provide nearly all the force required to cause plate motion by slab pull and slab suction.
- Convective upwelling is more diffuse and occurs in the upper mantle at divergent plate boundaries to fill a void, and in the lower mantle as superplumes, which probably connect to at least some hot spots at the surface.
12.8 What forces cause plate motions and plumes?