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| Frage | Antworten |
| corrosion (solution) | a chemical reaction between certain rock types e.g. lime stone and river water. the acid in water wears the rock away. |
| corrosion/abrasion | particles (the load) carried along the river and rub and rub and wear away at the rock on the beds and banks. (like sandpaper |
| attrition | this is where the small rocks and pebbles crash into each other getting smaller and smaller |
| hydraulic action | This is where the sheer force and pressure of the water gets into the cracks of the banks causing them to expand. |
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