The process of radiocarbon dating relies on the known rate at which radioactive isotopes decay and measuring the remaining amount of radiocarbon within a sample.
Few archaeologists who have concerned themselves with absolute chronology are innocent of having sometimes applied this method. ." In spite of its flaws, it is far more accurate than radiodating. In other words, the whole picture is now consistent with the non-equilibrium model. C., there are no suitable [historically dateable] materials for calibration purposes, and so it is not possible to trace the curve back further in time . "Conventional C-14 calibration has the effect of `stretching out' radiocarbon time and slowing down, for example, the rate of man's cultural development.
And if it is completely out of date we just drop it. Before this, the atmospheric activity is observed to decrease in such a way that, by about 2000 B. Clearly, the trend for older samples to have progressively lower delta % levels is observed.
"In a gravel deposit at the Union Pacific Mammoth Site near Rawlins, Wyoming, a mammoth skeleton was found together with artifacts that indicate the animal was killed by man.
Radiocarbon dating of ivory from the center of the tusks establishes the kill date at approximately 11,300 radiocarbon years ago.
“In most cases the radiocarbon levels deduced from marine and other records have not been too far wrong.