It depends on the rock type and its exposure to the agents of weathering.
Magnetite is an extremely rare metal (rock) and can take 459,000 to 23,000,000 years to form.
10,000,000+ years
thousands to millions of years
Typically thousands to hundreds of thousands of years.
yes it takes million of years for sedimentary rocks to form
It will take 400 years.
about 15,000,000 years
thousand of years
500 years
45 years
Magnetite is an extremely rare metal (rock) and can take 459,000 to 23,000,000 years to form.
50 years
It could take minutes or thousands of years, depending on the rate of cooling.
It may take centuries for a soil to become fertile through the breakdown of rock and the accumulation of organic material, but human mismanagement can destroy that fertallity within a few years.
it takes for 6 to7 years to break.
It varies with the type of rock being formed. Some igneous rock is formed in a matter of minutes; some sedimentary rock is formed in processes requiring many millions of years.
It can take as many years as it needs to. It all depends on what kind of weathering occurs, and how big the grain size is.