The 13,000-Year-Old Man Found On A California Island — And The Dating Test That Changed The Story Of America’s First Migration
First, it requires a much smaller sample — a few milligrams of carbon rather than several grams.
Second, it is substantially more precise for very old samples, because the uncertainty of direct counting is lower than the uncertainty of decay-rate measurement.
For very old, very rare, fragmentary human bone — exactly the situation at Arlington Springs — AMS dating was transformative.
It meant that the bones could be tested without consuming more than a tiny fraction of their material.
The smaller sample requirement opened the possibility of dating material that would have been too small or too precious for conventional radiocarbon.
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