Coastal Erosion and Deposition Questions Answer these questions on a separate sheet of loose leaf. 1. What causes coastal erosion and what exactly is eroded? 2. What causes erosional and depositional landforms? What are three examples of each type of landform? 3. Describe two types of coastal erosion caused by waves. 4. What is littoral drift and what can be created when littoral drift occurs? 5. How is a lagoon created? 6. Explain how a tombolo is made. 7. Draw and label a coastline that has a tombola, spit, bay barrier and a lagoon.