1. Do now
List the three types of plate boundaries and describe what geographic features you would find at each one.

2. Crustal Movement

3. Crustal Movement CRUST: The rocky outer surface of the Earth
When layers of sedimentary rock are disturbed after they have been deposited (laid down)
Sedimentary rocks are deposited in horizontal layers called “beds” or “strata”
What kinds of things do you think could make the Earth’s crust move and change?

4. How are sedimentary rocks deposited?

5. Evidence Suggesting Minor Changes in the Earth’s Crust
The Principle of Original Horizontality
When sedimentary rock layers are laid down in horizontal layers

8. Deformed Strata Any sedimentary layer that is no longer horizontal
Three Main Types:
Folded
Layers that are bent or wavy
Tilted
Layers that are at an angle
Faulted
Layers that do not match up

9. Folded Strata

10. Tilted Strata

11. Faulted Strata

12. Scientists use these strata to calculate the age of the Earth.
Fossils of the same specimen might be found in different layers of the same age.

13. Uplifting / Subsidence
Layers of strata are pushed up
Subsidence
Layers sink due to
accumulation

14. Major Events That Cause Crustal Movement
Earthquakes,
Volcanoes,
And
Plate Movements