Limitations carbon 14 dating
It is confusing when the maximum date for Carbon 14 is listed as 60,000 years and 80,000 years in the same article (Chapter 4 Dating Methods by Roger Patterson and the reference article summary 4.2 by Riddle.) and as 50,000 years in another (The Answers Book) as well as 95,000 years in the Creation College lecture by Dr. This is why there is the disparity in the quoted limits to radiocarbon dating, as highlighted by this inquirer. This is due to the fact that the AMS instrument has to be calibrated, and yet the organic materials used for calibration (that are supposed to be so old they shouldn't have any detectable radiocarbon left in them) all contain so much radiocarbon that it means samples of unknown age can't yield dates above this radiocarbon barrier.Radiocarbon Dating may come in as a very handy tool to utilize, but it also has its flaws.One of the most important flaws is that scientists are only able to date back till 62,000 years ago.This means that we cannot figure out the age of dinosaur fossils, or any ancient mammals and reptiles.Another one of its flaws is that it is not extremely accurate. The other factor is what has become known as the "radiocarbon barrier" at around 55,000–60,000 years.
So you can see why the various age limits have appeared in different publications of ours.
They can also be obtained from carbonate deposits such as tufa, calcite, marl, dissolved carbon dioxide, and carbonates in ocean, lake and groundwater sources.
Carbon dioxide is distributed on a worldwide basis into various atmospheric, biospheric, and hydrospheric reservoirs on a time scale much shorter than its half-life.
The word "estimates" is used because there is a significant amount of uncertainty in these measurements.
Each sample type has specific problems associated with its use for dating purposes, including contamination and special environmental effects.