Evolutionary dating methods
Geologists use this method to date volcanic rocks that may be as much as 4 billion to 5 billion years old.
Scientists use a device called a spectrometer to measure the accumulation of Ar-40 in relation to amounts of K-40.If this rock is above a fossil, that fossil can be dated as “older” than the volcanic rock above it.article on “Archaeology” explains: “Potassium-argon dating provides approximate dates for sites in early prehistory.But does this assumption lead to circular reasoning and wrong conclusions?Since evolutionary theory is generally assumed to be true, it is to be expected that dates that do not fit the evolutionary timescale will be reexamined or dismissed.
Search for evolutionary dating methods:
Carbon-14 has a half-life of 5,730 ± 40 years—, half the amount of the radioisotope present at any given time will undergo spontaneous disintegration during the succeeding 5,730 years.