And carbon 14 dating
They concluded that the helium in the rock was 100,000 times more plentiful than it should have been if the rocks were really 1.5 billion years old.They concluded that their findings are consistent with an Earth that is about 6,000 years old.Radiocarbon ages do not increase steadily with depth, as one might expect. In other words, the concentration of carbon-14 is unexpectedly low in the lower organic layers.As one moves to higher and higher layers, this concentration increases, but at a decreasing rate.If the atmosphere's ratio of carbon-14 to carbon-12 has doubled since the flood and we did not know it, radiocarbon ages of things living soon after the flood would appear to be one half-life (or 5,730 years) older than their true ages.If that ratio quadrupled, organic remains would appear 11,460 (2 x 5,730) years older, etc.
The most common radioactive element in granite is Uranium-238.Gen1Denying Evolution Evolution=Millions Of Years Your Imagination Creation Answers Book 20 Chapters (More than 60 of the most asked questions about Creation, evolution, and the book of Genesis answered!) Gen1Denying Evolution Evolution=Millions Of Years Your Imagination 2 Peter 3:5 "For this they are willingly ignorant of, that by the Word of God the heavens were of old, and the earth standing out of the water and in the water:" New Light on Radiometric Dating (Creation Moments.com)Most people find the subject of radiometric dating too technical to understand.Cosmic radiation striking the upper atmosphere converts about 21 pounds of nitrogen each year into radiocarbon (carbon-14).Most carbon-14 quickly combines with oxygen to form radioactive carbon dioxide, which then spreads throughout the atmosphere.
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However, for the last 3,500 years, the increase in the ratio has been extremely slight.