Tl dating range is carbon dating accuracy or not
As a result, there is a changing ratio of carbon-14 to the more atomically stable carbon-12 involves actually counting individual carbon-14 atoms.
This allows the dating of much older and smaller samples but at a far higher cost.
Paleoanthropologists and archaeologists must always be aware of possible radiocarbon sample contamination that could result in inaccurate dates.
In the example below, the bone must date to sometime between 1.75 and 1.5 million years ago.
Such contamination can occur if a sample is exposed to carbon compounds in exhaust gasses produced by.
In addition, any argon that existed prior to the last time the rock was molten will have been driven off by the intense heat.
As a result, all of the argon-40 in a volcanic rock sample is assumed to date from that time.
When a fossil is sandwiched between two such volcanic deposits, their potassium-argon dates provide a minimum and maximum age.