Mountains on Earth are formed by tectonic shifts and volcanic eruptions, which, yes, take millions of years. Mountains on the moon (aka: crater walls) form nea

Mountains on Earth are formed by tectonic shifts and volcanic eruptions, which, yes, take millions of years. Mountains on the moon (aka: crater walls) form nearly instantaneously because of a violent impact. You can make instant mountains on Earth too. Downside is, it'll probably kill off most life on the planet.