Both historical EPR eruptions (1991-92 & 2005-06) I dated with 210Po, but it only goes back 2.5-3 yrs. For this MCR interval, we would use 210Pb-226Ra, but since moving to RI, I no longer have a lab for that. I will have a new clean lab in a building we should have by 2028, but not right now.
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