Parent daughter ratio radiometric dating
As time progresses, the line connecting the measurements within the sample moves counter-clockwise around a point intersecting the y-axis, a point that represents the initial ratios (Dalrymple 20).Once the ratios are plotted, the age of the rock being dated can be determined based on the slope of the line.However, young-Earth creationists believe in an Earth that was created only 6,000 years ago.
On an isochron diagram, this change in ratios shifts each measurement from the sample up and to the left at a one-to-one rate.
Radioactive decay has become one of the most useful methods for determining the age of formation of rocks.
However, in the very principal of radiometric dating there are several vital assumptions that have to be made in order for the age to be considered valid.
Points that do not fall on a straight line suggest contamination, and this invalidates the results.
However, by this same principle, points falling relatively close to a best fit line should provide an accurate date for the age of the rock being dated (Stasser 1992).
As time progresses and decay occurs, the number of atoms of the parent isotope decreases, and the number of atoms of the daughter isotope increases accordingly.