Bone age dating archaeology Wedou sex

The requirement of identical burial conditions means that fluoride dating works best when it is applied within a single site with little variation in soil chemistry.

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.

A desciption of the method is given in: Schurr, Mark R.1989.

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.

Bones are primarily composed of the mineral calcium hydroxy apatite.

When exposed to water that contains fluoride, a fluoride ion (F-) can replace a hydroxyl ion (OH-) in the bone mineral.

The resulting fluor-apatite is more stable than the original form, thus the fluoride content of a bone will increase over time if it is exposed to a solution containing fluoride ions.

Fluoride ions are present in trace amounts in most soils and groundwaters.

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