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?
Fig 13.14
Here the exposed beach lines along Hudson Bay lend credence to the flexural isostasy model. As the region continues to uplift, the former beaches are left high and dry. Per isotopic dating, the oldest beaches
in the photo are around 8000 years old. As sea levels have risen over the past 21,000 years since the retreat of the glaciers (which added considerable water to ocean systems), the only reasonable explanation is that the region is rising.