The proportion of carbon left when the remains of the organism are examined provides an indication of the time elapsed since its death. Over time, ionizing radiation is absorbed by mineral grains in sediments and archaeological materials such as quartz and potassium feldspar.
It merely means that the ratios are the same in the particular magma from which the test sample was later taken. Radioactive Decay The methods work because radioactive elements are unstable, and they are always trying to move to a more stable state. Henry Morris has a PhD in Hydraulic Engineering, so it would seem that he would know better than to author such nonsense. If the same result is obtained sample after sample, using different test procedures based on different decay sequences, and carried out by different laboratories, that is a pretty good indication that the age determinations are accurate. While uranium is water-soluble, thorium and protactinium are not, and so they are selectively precipitated into ocean-floor sediments , from which their ratios are measured. If carbon is so short-lived in comparison to potassium or uranium, why is it that in terms of the media, we mostly about carbon and rarely the others? Radiocarbon dating has transformed our understanding of the past 50, years.