Controversy over carbon dating
The calculations for the earth's age using changes in the earth's magnetic moment are derived from thirty-four observatory measurements over a 150- year period starting in 1829.
Such measurements of the earth's dipole moment can be graphed, showing the relationship between intensity and time (see figure 1).
The magnetic forces have left their imprint upon rocks, such as lava flows, and in loose sediments, such as lake beds and deep-sea sediments, and sensitive instruments can decipher what some of the magnetic forces were at the time the rocks and sediments were first deposited.
One branch of paleomagnetism, called archeomagnetisrn, attempts to analyze the forces of the magnetic field as derived from archeological artifacts subjected to high temperatures, such as pottery and bricks from kilns.
" It merits therefore a close scrutiny by creationists first from a Biblical standpoint and second from a scientific one.
Precise measurements from various observatories have indicated that the magnetic dipole moment has been decreasing in intensity from 1835 to the present time.
For understanding the magnetic record prior to 1835, scientists turn to geology and archeology and look for evidences of paleomagnetism in the earth's crust.
Based upon a decaying magnetic field, Barnes feels that the earth could not be more than ten thousand years old, and more likely has an age of six thousand or seven thousand years, thus conforming with the Biblical record.
The magnetic decay method of age dating has been proclaimed as the most reliable evidence available for establishing a young age for the earth.