Standard Name A_MAD Data source "Thomson et al., 2012, G3" Matrix Apatite Brief description "Madagascar Apatite" Notes URL Parameter Units Value Uncertainty Age 473.46 - 206Pb/238U 0.0762416 0.000164581 207Pb/235U 0.6012570 0.018359795 208Pb/232Th - - 207Pb/206Pb 0.0571961 0.001688270 c207Pb/206Pb 0.8681 206Pb/208Pb - - 206Pb/204Pb - - 207Pb/204Pb - - 208Pb/204Pb - - Pb ppm - - Th ppm - - U ppm - - 176Hf/177Hf - -