Radiocarbon and tree-ring data are evaluated in light of current creationist understanding of the impact of the Flood on global geophysical systems to deduce a most probable date for the Flood. A date within a few thousand years of 12,000 B.C. is found. This date is tentatively accepted, and a creationist model for the increase in global I·C specific activity fo11owing the Flood is derived using it. The model readily explains the long-term past behavior of atmospheric I·C recorded by approximately 9000 year continuous tree-ring sequences in Europe and America. This seems to provide strong support for the validity of the model (and, hence, the approximate date for the Flood upon which it is based) as well as the legitimacy of these long dendrochronologies. The model implies that conventional radiocarbon dates in excess of about 11,000 B.P. greatly exceed the true dates. It provides a rational basis for calibrating conventional I·C dates, thus providing creationists with an objective and universal radiometric chronometer for determining the chronology of earth history from the Flood to the present.
