Carbon dating and the
a nonmetallic element found combined with other elements in all organic matter and in a pure state as diamond and graphite. Diamonds and graphite are pure forms, and carbon is a major part of coal, petroleum, and natural gas. The element carbon is also important, however, outside the chemistry of living things.
Carbon can bond to itself and forms an enormous number of important molecules, many of which are essential for life. The two most familiar forms of carbon—diamond and graphite—differ greatly because of the arrangement of their atoms.
The age of the rock can be calculated if the ratio of uranium to lead is known.
As the rock gets older the proportion of lead increases.
Other significant allotropes include fullerenes and nanotubes.
The half-life of uranium-238 is 4500 million years.
This assumption is backed by numerous scientific studies and is relatively sound.
However, conditions may have been different in the past and could have influenced the rate of decay or formation of radioactive elements.
Carbon-14 comes from nitrogen and is independent of the carbon-12 reservoir.
If even a small percentage of the limestone deposits were still in the form of living marine organisms at the time of the Flood, then the small amount of carbon-14 would have mixed with a much larger carbon-12 reservoir, thus resulting in a drastically reduced ratio.