ES Chapter 7-10 Erosion & Deposition Notes

ES Chapter 7-10 Erosion & Deposition Notes -...

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Erosion : process that moves soil and rock & reshapes the land. I. A. Load – amount of material carried by stream. (Faster rivers carry more load.) 1. Bed load – dragged on bottom (larger particles) 2. Suspended load – carried by water (smaller particles) 3. Dissolved load – dissolved in water ( smallest particles) B. Surface Erosion 1. Erosion begins at the source. 2. Deposition of eroded material occurs at the mouth, or base level. (Sea level is the ultimate base level.) 3. Young River – V-shaped valley; steep walls; large elevation difference between 4. Mature River - wide, gently sloping valley; develops a fertile flood plain. I.e. Nile River 5. Old River – S shaped meanders; may form oxbows (crescent shaped lakes) during flooding.
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C. Water Deposits 1. As river slows, the load is deposited. 2. Sandbar- load deposited on river bottom 3 . Delta – load deposited at mouth of river 4. Alluvial Fan
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ES Chapter 7-10 Erosion & Deposition Notes -...

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