The Main Landforms Associated With These Processes (Changing river environments)
Muhtasari
A river is a sculptor working in slow motion. With the same handful of tools, erosion, transport and deposition, it cuts plunging waterfalls in the hills, swings lazy meanders across the lowlands, and fans out fertile deltas at the sea. Read the shape of a valley and you can read the river's energy, its rock, and its age.
This lesson takes you landform by landform, from the V-shaped valleys and waterfalls of the upper course to the meanders, oxbow lakes, levees, floodplains and deltas of the lower course. For each one you will learn its key features and, just as importantly, the step-by-step process that forms it, with real examples such as Niagara and Victoria Falls.
Malengo
- The characteristics and formation of landforms: waterfalls, rapids, gorges, V-shaped valleys, meanders, oxbow lakes, levées, floodplains, deltas, interlocking spurs, potholes.
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- A waterfall forms where: A. soft rock lies over hard rock B. hard rock lies over soft rock C. the river deposits its load D. two rivers meet Answer: B
- On a meander, erosion is greatest on the: A. inner bank B. outer bank C. river bed only D. slip-off slope Answer: B
- An oxbow lake is finally cut off from the main channel by: A. erosion B. evaporation C. deposition across the loop ends D. tributaries Answer: C
- Raised banks built by deposition during floods are called: A. terraces B. levees C. deltas D. spurs Answer: B
- A steep-sided valley left as a waterfall retreats is a: A. floodplain B. delta C. gorge D. meander Answer: C
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