oxidizable carbon ratio
...that measuring the oxidizable carbon ratio is a way to determine the age of charcoal samples up to 35,000 years old?
...that measuring the <b id="mwEQU"><a href="./Oxidizable_carbon_ratio_dating" id="mwEQY" rel="mw:WikiLink" title="Oxidizable carbon ratio dating">oxidizable carbon ratio</a></b> is a way to determine the age of <a href="./Charcoal" id="mwEQc" rel="mw:WikiLink" title="Charcoal">charcoal</a> samples up to 35,000 years old?