Article here on Methana. That's a volcano on the Thera chain. The study runs from before even Neanders got there 700kBC, down to the early-third-century-BC eruption Strabo noted.
You'd think we could date Strabo's eruption more securely but, the paper doesn't.
The worry in that paper is a dormant epoch 280-170kBC, preEemian/MIS5e. The underbelly was producing zircons - raising them up from the depths, anyway. But there/then was no eruption. This suggests churn under a volcano that looks as frozen as Olympus over on Mars but... isn't.
People around Rainier and Hood, take note.
BACKDATE 4/30 like it matters.
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