paleomagnetism and isotope ratios along with biostratigraphy identify the strata of the local geology and determine their relative chronology.
the verification of local geochronology is crucial to the accurate dating of any one particular feature or assembly.
There are a number of implausible assumptions involved in radiometric dating with respect to long time periods.
One key assumption is that the initial quantity of the parent element can be determined.
However, human beings love to see factual precision, and we want to know how old something is.