date ancient rocks
... that the exotic metal lutetium-176 decays to the heavy metal hafnium, so it can be used to date ancient rocks?
... that the exotic metal <a href="./Lutetium" id="mwAzg" rel="mw:WikiLink" title="Lutetium">lutetium</a>-176 decays to the heavy metal <a href="./Hafnium" id="mwAzk" rel="mw:WikiLink" title="Hafnium">hafnium</a>, so it can be used to <b id="mwAzo"><a class="mw-redirect" href="./Lutetium-hafnium_dating" id="mwAzs" rel="mw:WikiLink" title="Lutetium-hafnium dating">date ancient rocks</a></b>?