Answer:
B. Runoff from heavy rainfall forms narrow, shallow channels
Explanation:
The rill erosion occurs at places that are stripped of vegetation, or do not have it naturally. The area in which this erosion occurs also has to be at a certain angle, thus it has to be a slope. When a heavy rainfall occurs, it manages to create runoff. The runoff over-saturates parts of the soil, and starts moving it downwards. As it moves it downwards, narrow, shallow channels are being formed. The water runs through this streamlets, or headcuts, moving the soil down with it, thus causing an extensive erosion of the area.
Answer:
1 - 3 - 4 - 2
Explanation:
1 . A stream migrates laterally across its floodplain developing meanders. This stream terminates at a lake, which is its base level.
2. The base level of the stream is lowered by crustal uplift and the river begins to incise downward.
3.Incised meanders form.
4.A rincon forms by the cutoff of an incised meander, which shortens the river.
From its source high in the Rocky Mountains, the Colorado River channels water south nearly 1,500 miles, over falls, through deserts and canyons, to the lush wetlands of a vast delta in Mexico and into the Gulf of California. That is, it did so for six million years.
Most of them came from central africa and west africa.
