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At its deepest, Happy Valley is close to 330 m (a bit over 1000 feet) deep, and it once was at least as high as the mountains around the valley. Let us call the thickness of rock removed from the valley each year, your answer in the previous blank, 0.000033 m. Then the depth of the valley, 330 m, divided by the erosion rate, 0.000033 m/yr, yields the number of years it took to hollow out Happy Valley, __________yr. This should be a large number.

Respuesta :

Answer: 10,000,000 years

Explanation:

Erosion of a land-form is a very slow process, it takes several years to convert a hill into valley by the soil erosion.

Various factors of soil erosion are:

  • Loss of vegetation is the primary condition for soil erosion because the roots of the plants bind the soil and prevent the losing of soil by the effect of wind and flowing water.
  • Rain water.
  • Blowing winds.
  • Ice of the glaciers.
  • Agricultural practices also make the soil exposed to the above mentioned factors.
  • Over grazing by animals.
  • Mining activities.

[tex]Time for erosion= \frac{Depth of Erosion}{ersion Rate}\\\\[/tex]

[tex]Time for erosion=\frac{330}{3.3\times 10^{-5}}[/tex]

[tex]Time for erosion=10^{7} years[/tex]

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