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Obsidian dating can be lacking in the dating area because of the time it takes to absorb water from the environment, variable absorption rates because of temperature and relative humidity of the environment climate, tendency of rim layers to crumble, needing to be hydrated several decades before being able to date, and generally has not proven very successful in the past.

Even with its short comings there is still potential on this continuously progressing method by way we are correcting mistakes and improving upon the method of obsidian hydration.

The effect of composition can be determined from chemical analysis or the refractive index of the glass.

Exposure-temperature history requires a number of considerations enumerated in this paper.

At present there is no robust and cost-effective protocol for measuring hydroxyl concentration.

Suggested guidelines for obsidian hydration dating are developed using a case study.

I will be explaining why we should not give up on this dating process and why it could successfully produce chronometric dates, but it is important that we must first know the past before we move forward.

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One half-life is the amount of time required for of the original atoms in a sample to decay.

Over the second half-life, of the atoms remaining decay, which leaves of the original quantity, and so on.

In other words, the change in numbers of atoms follows a geometric scale as illustrated by the graph below.other carbon isotopes in the same ratio as exists in the atmosphere.

Obsidian hydration dating typically yields a range of ages for a single chronometric measurement, even after controlling for source chemistry and effective hydration temperature.

Previously published data suggest that this range is due to hydration rate variations caused by variability in the concentration of intrinsic water, and specifically hydroxyl ions, in the obsidian.