it takes a delta to form 100 years or more
i believe it takes 100 years to form a delta
One must have a minimum of four years in Service to qualify for the Delta Force.
Many Years. Many Years.
1 million years
1 million+ Years to be a diamonds... :/
around 100 years
1.
One Billion!
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.
The average growth rate is 0.13 mm a year
Probably a few million years. Most likely many years, due to Evolution. :P