Lecture 13
Table of Contents
- Tectonics and Surface Relief
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Why study surface relief?
- Above and Below sea level
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.1 Why are continents high and oceans low?
- 13.2 How do we know ... that mountains have roots?
- 13.2 How do we know ... that mountains have roots?
- 13.2 How do we know ... that mountains have roots?
- 13.2 How do we know ... that mountains have roots?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- Glacial Isostasy
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.3 How does isostasy relate to active geologic processes?
- 13.4 Why does sea level change?
- 13.4 Why does sea level change?
- 13.4 Why does sea level change?
- 13.4 Why does sea level change?
- 13.4 Why does sea level change?
- 13.4 Why does sea level change?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.5 How and where do mountains form?
- 13.6 How does mountain building relate to the growth of continents?
- 13.6 How does mountain building relate to the growth of continents?
- Non-Subductable Crust
- Non-Subductable Crust 2
- 13.6 How does mountain building relate to the growth of continents?
- 13.6 How does mountain building relate to the growth of continents?
- 13.6 How does mountain building relate to the growth of continents?
- Provinces of North America
- 13.6 How does mountain building relate to the growth of continents?
- 13.6 How does mountain building relate to the growth of continents?
- 13.6 How does mountain building relate to the growth of continents?
- Island Arcs
- 13.6 How does mountain building relate to the growth of continents?
Text and Images from Slide
13.3 How does isostasy relate to active geologic processes?
- Isostatic adjustment causes earthquakes
- Isostatic movement of crust causes stress
- Stress in rocks from glacial rebound tends to be less than tectonic stress but can reactivate older, preexisting faults
- The New Madrid earthquakes of 1811-1812 are thought to be due, at least in part, to glacial rebound stress
- Relatively small stresses, such as the mass of water behind dams, could trigger old fault systems
- In such instances, water in pore spaces can weaken rock materials