Question

Evidence shows that there were once Himalayan-scale mountains in northern Canada, in an area now eroded nearly flat. If the Earth were only 6,000 years old, as was once believed, how fast would the rate of erosion have had to be for these mountains to be eroded to sea level in 6,000 years? Give your answer in meters and millimeters. Group of answer choices

Answer 1

1.475 m/yr or 1475 mm/yr

Step-by-step explanation:

Height of mountain (Himalayan - scale) = height of himalayan = 8848 meters

Hence, height of mountain 6000 years ago = 8848 meters

Height of mountain now = nearly flat or eroded to sea level

Sea level means a datum of 0

Hence, the rate at which mountain was eroded is the ratio of the initial height and the time taken to be eroded to seal level (0)

Hence,

Initial height / number of years

= 8848 meters / 6000 years

= 1.4746 meters / year

= 1.475 m/yr

OR

(1.475) * 1000 = 1475 mm/yr