BilliardsBall
Veteran Member
He should not admit it because its not true, Carbon dating and Ar/Ar dating are not the only methods. The pre-circa 5,000BP period fits well with the ranges of the following methods.
Thermoluminescense
Optical Dating
Archeomagnetic
Lead Corrosion
Amino-Acid
Rehydroxylation (Probable. Still being tested but should be good for about 10k years back).
And all these give consistent dates with the radiometric techniques.
These ARE radiometric in nature:
Thermoluminescence (TL) dating is the determination, by means of measuring the accumulated radiation dose Thermoluminescence dating - Wikipedia, the free encyclopedia
Optical dating... All sediments and soils contain trace amounts of radioactive isotopes including uranium, thorium, rubidium and potassium. These slowly decay over time and the ionizing radiation they produce is absorbed by other constituents of the soil sediments such as quartz and feldspar... In 1994, the principles behind optical and thermoluminescence dating were extended to include surfaces made of granite, basalt and sandstone, such as carved rock from ancient monuments and artifacts. Optical dating - Wikipedia, the free encyclopedia
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Archaeomagnetic dating makes unfalsifiable assumptions about Earth's magnetic field in the past
Lead corrosion dating - Data analysis requires the consideration of kinetics in addition to thermodynamics, due to the temporal component of voltammetry. Idealized theoretical electrochemical thermodynamic relationships such as the Nernst equation are modeled without a time component.
Amino acid dating requires biological tissue to be present. To date something circa 5,000 BP we have to be certain (or else assume) the biologic material did not contaminate the sample at some later date.
And as you said, rehydroxylation is consistent with the other dating techniques, even though it is speculative in nature. Now, there's no assumption there (rolls eyes).