Argon argon radioactive dating method
As another example, a date that is obviously wrong would confirm a strong belief in the fundamental unreliability of radioactive dating.
K-Ar Processing The Potassium-Argon dating method is an invaluable tool for those archaeologists and paleoanthropologists studying the earliest evidence for human evolution.This arises when the person performing the analysis has a strong expectation of what the result should be.For example, the geological formations and dates from surrounding features may suggest that the "true" date can only lie within a certain range.As the K-40 in the rock decays into Ar-40, the gas is trapped in the rock.In this simulation, a unit of molten rock cools and crystallizes. Note that time is expressed in millions of years on this graph, as opposed to thousands of years in the C-14 graph.It is impossible to measure the age of something, except to time it as it actually occurs, so radioactive dating methods calculate the age, based on (i) measurements of quantities of specified materials, (ii) measurements of decay rates, and (iii) assumptions about the history of the sample.
Suppose we have a tank partly filled with water, and a hole in the bottom through which the water is leaking out of the tank.
Several dozen methods exist, using different radioactive isotopes and decay products, with varied dating ranges and precision.
The procedure, however, is difficult, and many tests have shown that it can be inaccurate, and it is at times not even considered reliable by mainstream scientists.
Click on the "Show Movie" button below to view this animation.
K-Ar Decay Profile Clicking on the "Show Movie" button below will bring up an animation that illustrates how a K-Ar sample is processed and the calculations involved in arriving at a date.
Unless these factors are known, the calculated dates will not be reliable.