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These investigations suppose complete coordination between different disciplines and laboratories.The experimental method applied to events in the past.Later events are able to modify and restructure the consequences of the prior event, figure 2, giving erroneous conclusions.What we can observe today is the result of a chain of causes spread over a period of time.If this condition is true, then a “model age” allows the calculation of a time function of argon40 and potassium40 present in the rock, and of the half-life of potassium40. The detection limit, function of the K40 content in the rock, ranges between 0.01 and 0.2 Ma (Ma = mega anni = million years).But, in addition, it is necessary to consider a “closed” system without any loss and/or gain of Ca40, K40 or Ar40.
Applied to presently observable phenomena, it is always possible for other scientists to reproduce the experiments.
This work explains these erroneous ages by « excess » argon (radiogenic and/or primeval) in volcanic rocks under study.
This excess argon greatly alters the calculated age and puts into question the validity of the method.
This calibration supposes a great number of basic assumptions concerning initial conditions.
The choice of these initial conditions affects the results.The knowledge of a past event is indirect and a complex combination of assumptions and contemporary experiments is required to test the credibility of supposed initial conditions.