Radiocarbon samples which obtain their carbon from a different source (or reservoir) than atmospheric carbon may yield what is termed apparent ages.
A shellfish alive today in a lake within a limestone catchment, for instance, will yield a radiocarbon date which is excessively old.
Steven Austin rightly wonders, "Has anyone successfully dated a Grand Canyon rock? The validity of the calculated date can be no stronger than the weakest link (weakest assumption) used in the calculation.
What are some of the assumptions made by most Evolutionists in using these systems?
The reason for this anomaly is that the limestone, which is weathered and dissolved into bicarbonate, has no radioactive carbon.
In order to ascertain the ages of samples which were formed in equilibrium with different reservoirs to these materials, it is necessary to provide an age correction.
Theoretically, Creationism remains workable within a wide range of age estimates.
Scientists have proposed numerous age estimation methods.
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[A Conventional Radiocarbon Age or CRA, does not take into account specific differences between the activity of different carbon reservoirs.