Erosion, deposition

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  • 1. Erosion The process by which wind, water, ice or gravity transports (takes) soil and sediment from one location (place) to another.

2. Wave Erosion This happens when waves crashagainst the shore. Following are some pictures and descriptions of wave erosion. 3. Sea Stackswere once connected to the mainland. Waves have ERODED the mainland leaving behind columns of rock, standing all alone. 4. Sea Archesform when wave action continues to erode a sea cave, cutting completely through the rock. 5. Sea cavesform when waves cut large holes into weak rock along a sea cliff. 6. Wave Deposition What is Wave Deposition you ask? Well Waves carry a lot of stuff, including sand, rock pieces, dead coral and shells. A lot of times, this material is deposited, or left, on a shoreline, where it forms a beach. Following are some examples of what waves have deposited on the shore. (Wave deposition) 7. Beaches are made of different types of material deposited by waves. 8. Other types of water erosion A river caused this beautiful valley in Hawaii to form. 9. The Grand Canyonever been there? The Grand Canyon was formed by moving water. 10. Wind Erosion Have you ever been working outside and had a gusty wind blow a stack of papers all over the place? If this has happened to you, then you have seen how wind erosion works. Wind removes soil, sand, and rock particles and transports them from one place to another. 11. Wind Erosionthe grinding and wearing away of rock when blowing pieces of sand and rock rub against another rock surface. 12. Wind Deposition Ok, now that you know what wave deposition is, I bet you can guess what wind deposition is right?.....So..what is it? 13. Loessfeels like baby powder! Loess forms when wind carries material far away from its source. 14. Sand dunesform when a mound of wind-deposited sand keeps moving and keeping its shape at the same time, even though it moves. 15. Ice or Glacial Erosion Glaciers smooth the land by scraping and eroding parts of the land that were there before the ice appeared. Glaciers also carve out rugged features in the mountain rock through which they flow. Following are some example pictures. 16. Alpine ValleyGlaciers carved out this rugged landscape in Switzerland. 17. By the wayMrs. Ambrosio took this photo of that same valley in Switzerland (from the other direction, obviously) from a cable car. 18. Cirquesare examples of glacial erosion because glaciers cut into the back of the mountain. 19. Glacial Deposition Sotell mewhat is glacial deposition? 20. Glacial Drifthappens when rock material is carried and deposited (theres that word again) by glaciers. 21. Not allchanges in the earth are due to slow processes like EROSION. Some changes are due to rapid processes, like landslides, volcanic eruptions and earthquakes! Following are some picture examples. 22. Landslideshappen when rock and soil suddenly move down a slope. 23. Mudflowshappen when mud or rock and soil mixed with a large amount of soil flow down a slope or hill. 24. Volcanic EruptionsMt. St. Helens erupted on May 1, 1981. It definitely changed the land in the area. Before 25. AfterHow do you think the eruption of Mt. St. Helens affected the surrounding land?