Although these can transport huge quantities of sediment in a very short time, they are almost impossible to measure.
By comparison, the amount removed by winds, glaciers and ocean waves pounding the coastline is small.
Published ages for the structural elements of Australia.
These rates not only erode the idea of billion-year-old continents but also crumble the concept of ancient mountains.
In general, mountainous regions with their steep slopes and deep valleys are eroded fastest.
To make matters worse, many rivers erode the height of their basins much faster than average (Table 1).