Evolutionary dating methods
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.
One example of this is the KNM-ER 1470 fossil found in Kenya by Bernard Ngeneo, a field worker for the famous paleoanthropologist Richard Leakey.
When the original sample of the volcanic tuff was given to the laboratory, the potassium-argon date was about 230 million years.
The ratio of these elements can indicate the age of a geologic layer, generally since it last underwent a metamorphosis, such as melting under the heat of molten lava from a volcanic eruption.
Thus, geologic layers rich in volcanic deposits lend themselves to potassium-argon dating.” Sometimes radiometric dating methods give results that are totally wrong.
This date would mean that men lived during the time of the dinosaurs and would upset the evolutionary timescale.
So new samples were sent and finally a date of 2.4 million years was eventually accepted (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.
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.
Another problem with radiometric dating methods is the assumption about the amount of the original radioactive element.
How do we know exactly how much potassium was originally in the volcanic rock?
Many minerals contain radioactive K-40 (potassium 40) isotopes, which decay at a known rate into Ar-40 (argon 40) gas.
Scientists use a device called a spectrometer to measure the accumulation of Ar-40 in relation to amounts of K-40.
As we will see, this method clearly can give erroneous dates for strata. They found that living freshwater mollusks give anomalous dates of up to 3,000 years old.