Let’s do a rough calculation to show how this works.
The age of the earth can be estimated by taking the first five days of creation (from earth’s creation to Adam), then following the genealogies from Adam to Abraham in Genesis 5 and 11, then adding in the time from Abraham to today.
Floyd Jones4 and a much earlier book by Archbishop James Ussher5 (1581–1656). The misconception exists that Ussher and Jones were the only ones to arrive at a date of 4000 B. Jones6 lists several chronologists who have undertaken the task of calculating the age of the earth based on the Bible, and their calculations range from 5501 to 3836 B. Because of this, the Septuagint adds in extra time.
Hutton said: The past history of our globe must be explained by what can be seen to be happening now. Thinking biblically, we can see that the global flood in Genesis 6–8 would wipe away the concept of millions of years, for this Flood would explain massive amounts of fossil layers.
After Lyell, in 1899, Lord Kelvin (William Thomson) calculated the age of the earth, based on the cooling rate of a molten sphere, at a maximum of about 20–40 million years (this was revised from his earlier calculation of 100 million years in 1862).13 With the development of radiometric dating in the early 20th century, the age of the earth expanded radically.
In 1913, Arthur Holmes’s book, The Age of the Earth, gave an age of 1.6 billion years.14 Since then, the supposed age of the earth has expanded to its present estimate of about 4.5 billion years (and about 14 billion years for the universe).
Most Christians fail to realize that a global flood could rip up many of the previous rock layers and redeposit them elsewhere, destroying the previous fragile contents.
This would destroy any evidence of alleged millions of years anyway.