Spycam web chat - What is chronometric dating
The majority of chronometric dating methods are radiometric, which means they involve measuring something related to radioactivity, for example radioactive decay.
They are called chronometric because they allow one to make a scientific estimate of the date of an object as expressed in years.
The most commonly used chronometic method is radiocarbon analysis.
It measures the decay of radioactive carbon (14C) that has been absorbed from the atmosphere by a plant or animal prior to its death.
Radioactive carbon has a half-life of approximately 5,730 years plus or minus 40 years (1 standard deviation of error) and the theoretical absolute limit of this method is 80,000 years ago, although the practical limit is close to 50,000 years ago.
Thus a new record of engraved, perforated and/or sculpted items from the late Upper Palaeolithic of northern Spain is being created that will ultimately rival the corpus of classic finds made by the pioneer prehistorians with regard to aesthetic quality, socio-cultural importance and culture-stratigraphic significance, but will surpass it in terms of associational context and invariants , a new geometric formulation of gravity (which is fully equivalent to the standard form of General Relativity) is presented in a way very similar to that of the electromagnetic field, based solely on a second-rank anti-symmetric field tensor.
Relative dating methods allow one to determine if an object is earlier than, later than, or contemporary with some other object.