Then, to stop this "erosion," the obturating (sealing) primer came into use.
At the present rate of erosion it takes 2,640 years to eat away a mile.
There is also decivilization by erosion, and while it's going on, nobody notices it.
From top to bottom we have the unmistakable marks of erosion.
This cycle of events is called the erosion cycle or topographic cycle.