Magnetite is an extremely rare metal (rock) and can take 459,000 to 23,000,000 years to form.
thousands and thousands, there fossil fuels
Probably a few million years. Most likely many years, due to Evolution. :P
No they take million years
It takes of years for a canyon to form.
i believe it take about ten years to form a sand dune
Many Years. Many Years.
1 million years
1 million+ Years to be a diamonds... :/
1.
One Billion!
it takes a delta to form 100 years or more
There are many types of fossilization. Some take a surprisingly few number of years, and others occur over periods of millions of years.
It could take minutes or thousands of years, depending on the rate of cooling.
thousands and thousands, there fossil fuels
The average growth rate is 0.13 mm a year
No, some form quickly, some take thousands of years to form, some take millions of years to from.
Probably a few million years. Most likely many years, due to Evolution. :P