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How long does it take for mountains to grow(in years/decades)?
Question Date: 2011-03-17
Answer 1:

The tallest mountains on earth, the Himalayas, started forming about 50 million years ago and are still growing about two inches every year!

Answer 2:

Mountains can grow at rates as high as one inch per year...so to get very high mountains requires MILLIONS of years.

Answer 3:

It takes tens of thousands to hundreds of thousands of years to build a typical mountain range, except for volcanoes. Small volcanoes can form in months, but big volcanoes also take tens of thousands of years or more.

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