Typically (6): The above list is not exhaustive; most organic material is suitable so long as it is of sufficient age and has not mineralised - dinosaur bones are out as they no longer have any carbon left.
As a test, the team took samples of acacia wood from two Egyptian Pharaohs and dated them; the results came back to within what was then a reasonable range: 2800BC /- 250 years whereas the earlier independent dates (largely the dendrochronology records) were 2625 /- 75 years (3), (5).
Archaeologists had used Relative Dating methods to calculate their reigns.
It is assumed that level of carbon-14 in the atmosphere is constant.
date of organic material - but an approximate age, usually within a range of a few years either way.
One of the interesting applications of radioactive decay is the technique of radioactive dating.
Radioactive dating allows the estimation of the age of any object which was alive once, using the natural radioactivity of .Today, the radiocarbon-14 dating method is used extensively in environmental sciences and in human sciences such as archaeology and anthropology.It also has some applications in geology; its importance in dating organic materials cannot be underestimated enough.Increasingly though, students are learning about the principles of radiocarbon dates in archaeology, palaeontology and climate science degrees and can combine cross-disciplinary studies.The method developed in the 1940's and was a ground-breaking piece of research that would change dating methods forever. Libby calculated the rate of radioactive decay of the C isotope (4) in carbon black powder.It also allows the estimation of the age of geological samples using the decay of long lived nuclides.