1. Which agent of erosion created the U-shaped valley and the striations found in the flat rock on its floor?
(1) Running water (3) Glacial ice
(2) Mass wasting (4) Wind

2. Agents that erode also deposit.

3. Like eroding, depositing leaves clues…
Some agents of deposition sort (arrange) sediments by: size, shape, or density. Some agents DO NOT sort.

4. Assorted non-native sediments.
Mass Wasting & Glaciers do not sort. Unorganized deposits with no layers.
Assorted non-native sediments.
Local sediment.

6. Mass Wasting & Glaciers do not sort
Mass Wasting & Glaciers do not sort. Unorganized deposits with no layers.
Wind sorts out smaller sediments, leaving larger.

7. Mass Wasting & Glaciers do not sort
Mass Wasting & Glaciers do not sort. Unorganized deposits with no layers.
Wind sorts out smaller sediments, leaving larger.
Water sorts AND layers sediment deposits.

8. Sorted or unsorted?

9. Sediments found in glacial moraines (deposits) are best described as
(1) sorted and layered
(2) sorted and not layered
(3) unsorted and layered
(4) unsorted and not layered

10. Sorted, layered sediments
Water
Sorted, layered sediments
Look…they’re round!

11. Glacier
Unsorted, unlayered, not-local sediments

12. Sorted sediments (no large sediment around!)
Wind
Sorted sediments (no large sediment around!)

13. Wind
on Mars!

14. Glacier
Unsorted, “erratic”
(out-of-place)
sediments

15. Sorted or
unsorted?

16. NO! When water slows deposition occurs.
Sediments that are carried begin to settle.
Do all sediments settle at the same rate?
NO!

17. Large sediments settle faster than smaller

18. Large sediments settle faster than smaller

20. Large sediments settle faster than smaller
River’s mouth
Ocean or Lake

21. Large sediments settle faster than smaller
Denser particles settle faster than less dense

22. What if sediment is less dense than water?
Large sediments settle faster than smaller
Denser particles settle faster than less dense
What if sediment is less dense than water?

23. Large sediments settle faster than smaller
Denser particles settle faster than less dense
Rounder particles settle faster than flatter

24. Each of the rock particles below has the same density and volume
Each of the rock particles below has the same density and volume. Which particle will most likely settle at the fastest rate in moving water?