Stratigraphy—the study of layers of rock. Research Project Guide—Erosion and Deposition Directions: Try to find as much of this info as you can. Don’t forget to organize your notes so that info is easy to find later. Erosion and Deposition Definitions o What is erosion? o What is deposition? What is the root word? What does the root word mean? o What is sediment? What does it have to do with erosion and deposition? Types of Erosion and Deposition o How does gravity cause erosion? Where do the sediments get deposited? o What is a glacier? How do glaciers cause erosion? Where do the sediments get deposited? o How does wind cause erosion? Where do the sediments get deposited? o How does water cause erosion? Where do the sediments get deposited? Effects of Erosion and Deposition o What features of Earth’s surface form due to erosion and deposition? How do valleys form? How long does it take? How do sand dunes form? How are coastlines formed? What is a delta or fan?