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Erosion and Depositi
Surface Processes Part 2
| Term | Definition |
|---|---|
| Erosion | Process where particles are transported as sediments (helps shape and lower all surface features) |
| Agents of Erosion | Forces that are set in motion by gravity that causes sediments to move (Sorted: streams, waves, wind Unsorted: Glaciers, mass movement) |
| Gravity | Direct role (causes downward motion) force behind most agents of erosion, causes river to flow, ice to move, and rocks to slide |
| The Sun | Indirect role drives the water cycle which produces rain and ice, fuels winds and drives ocean currents |
| Deposition | The process by which sediments are released from an erosional system |
| Size | Larger sediments will settle faster |
| Shape | Rounder sediments settle faster and flatter sediments will take longer |
| Density | More dense sediments will settle faster |
| Sorted Sediment | Layers of sediments that are similar in size, shape, or density (deposition from a stream) |
| Unsorted Sediments | Layers of sediment that are mixed in size, shape, or density (deposition from a glacier) |
| Horizontal Sorting | When the velocity of a wind or water erosional system gradually decreases; the size, roundness, and density gradually decrease as you move farther out |
| Vertical Sorting | Larger or more dense sediments settle to the bottom first, followed by decreasing size and density |