Start Radiopotassium dating archaeology

Radiopotassium dating archaeology

Specific changes in its amino acid structure (racemization or epimerization) which occur at a slow, relatively uniform rate, are measured after the organism's death.

SYNONYMS OR RELATED TERMS: amino-acid dating; aminostratigraphy; amino-acid racemization, amino acid racemization CATEGORY: technique DEFINITION: A method of absolute (chronometric) dating which is hoped to fill the gap between radiocarbon dates and potassium-argon dates.

It is used for human and animal bone and other organic material.

The date on a coin is an absolute date, as are AD 1492 or 501 in which the proportion of carbon isotopes is counted directly (as contrasted with the indirect Geiger counter method) using an accelerator mass spectrometer.

The basis for stratigraphy seems quite intuitive today, but its applications were no less than earth-shattering to archaeological theory.

Stratigraphy is the oldest of the relative dating methods that archaeologists use to date things.

Stratigraphy is based on the law of superposition--like a layer cake, the lowest layers must have been formed first.

For example, JJA Worsaae used this law to prove the Three Age System.