Supplemental Table S3. 
Pb duplicate analyses.						

Sample	SDSU	SDSU	SDSU	VU	VU	VU
Name	206Pb/204Pb	207Pb/204Pb	208Pb/204Pb	206Pb/204Pb	207Pb/204Pb	208Pb/204Pb
8	18.393	15.5	37.716	18.407	15.519	37.809
9	18.369	15.507	37.62	18.485	15.439	37.26
12	20.136	15.611	40.052	20.185	15.619	40.115
						
Notes: Pb data for 12 at VU obtained from Biotite crystal.