How is relative dating used

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At the Los Pozos site in Arizona, fluoride dates from intersecting features (such as those shown here) excavated by Desert Archaeology, Inc.

were used to establish a relative chronology for house basins at the site.

Where more older features were cut into by more recent ones, the more recent features tend to produce bones with lower fluoride contents.

The results from these control features show that fluoride dating can be used to date house basins at Los Pozos that have not been cross-cut by other features (the majority of house basins at the site).

A calibration curve can be produced by measuring standard solutions of known fluoride concentration.

The calibration curve is then used to determine the fluoride content of unknowns.

Over time, buried bones pick up fluoride ions from soil moisture or exposure to groundwater.

The actual measurements will only consume about 15 mg. Schurr Director, Fluoride Dating Service Center Department of Anthropology University of Notre Dame Notre Dame, IN 46556 USA Phone: (219) 631-7638 FAX: (219) 631-8209 Email: Mark.

The fluoride selective electrode uses the same principle as the familiar p H electrode.

When the electrode is placed in a solution that contains fluoride, it produces a voltage that is proportional to the amount of fluoride in the solution.

Fluoride (or fluorine) dating is a relative dating method that can be used to date archaeological bone.

As a relative dating method, it can determine the relative age of specimens, but cannot provide a calendrical date unless the fluoride chronology is calibrated with an absolute dating method.

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