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<p>[QUOTE=&quot;desertgem, post: 3379640, member: 15199&quot;]Archeology has had to adjust the way C-14 dating is interpreted, as the technique is based on a natural level of C-14 in the atmosphere at the time of stopping accumulation of such, and no one had thought that there might be variations in the level of C-14 in the earth&#039;s atmosphere, such that during the last 50,000 years ( approximate practical limits of c-14) the level north of the equator and south of the equator could be different, but recent studies indicate they can be such now and in recent times, no one knows about beyond current records. About the only way carbon could get into most coin metal is from the smoke as mentioned, but if done with coal wood from plants that had died and become buried, and then re-exposed and used as fuel could throw doubts on specific aging. I doubt it was recorded what the fuel was and how obtained..</p><p>&nbsp;&nbsp;&nbsp; Also on the acoustic methods, it was mentioned that the metal coined with &#039;hammer&#039; or similar could leave acoustic waves that declined over time. I do not have knowledge or specific papers on this, I would appreciate if you do.&nbsp; My thought is that metals are heat smelted or produced in crystals with high purity ( gold, silver , copper) have gone through processes that would have left natural acoustic wave patterns much stronger than those of human production and I can not think of a way that one could tell the difference. It will be a long and shaky road at best.</p><p><br /></p><p>Be interesting what the college professors have to say.&nbsp;&nbsp; Jim[/QUOTE]</p><p><br /></p>

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