1. Title: Erosion and Deposition Page #: 54 Date: 1/14/2013
Table of Contents
Title: Erosion and Deposition
Page #: 54
Date: 1/14/2013

2. Objective
Students will be able to describe the relationship of gravity to the agents of erosion.

3. Word of the Day
Gravity: A force of attraction between objects due to their masses.

4. Erosion and Deposition
***Erosion transports weathered materials across Earth’s surface until they are deposited.***
3 Step Process:
Weathering breaks rocks
Erosion carries pieces away
Deposition drops materials in another location

5. Erosion and Deposition
Agents of erosion:
Running water
Glaciers
Wind
Ocean currents / waves
Gravity - The most important!

6. Erosion and Deposition
Gravity: Associated with most agents of erosion because it pulls materials down slope.
Gravity causes streams and glaciers to flow and pulls loose sediments down slope.

7. Erosion and Deposition
Glacial Erosion
Stream Erosion

8. Erosion and Deposition
Erosion by Water:
Moving water is the most powerful agent of erosion.
Wave Action:
Erosion occurs along the ocean floor, at continental and island shorelines.

9. Erosion and Deposition
Wave Action:
Ocean currents, waves and tides
Carve out cliffs and arches
Form dunes and beaches on shorelines when particles accumulate.

10. Erosion and Deposition

11. Erosion and Deposition
Erosion along shorelines
A constant and continuous process.
Sand along shorelines is picked up, moved and deposited by ocean currents.
Creates sandbars that can grow into barrier islands.
Common along Atlantic and Gulf coasts.
Example: North Carolina’s Outer Banks.

12. Erosion and Deposition
Outer Banks
Barrier Island
Sandbar

13. North Carolina’s
Outer Banks
Barrier Islands

14. Erosion and Deposition
Erosion along shorelines
Destroys shorelines by washing sand away.
Erosion damage on Plum Island, MA