There was an Older Dryas too

Leeds posted a release to "EurekAlert!"; this is reported in Newsweek and Drudge. Along with AD 774 and 993, and with 664/3 BC, a double-Miyake occurred in 14,300-year-old tree rings. That is actually "BP" so, 12350 BC (nearexact).

That's end-of-ice-age, but long before either Dryas. I don't think any human recorded it. It would have made for a mighty aurora. It is so long ago that the dead wood had already started on the fossilisation process; the pictures look like the outer, younger rings are already rock. Wood gets scarcer the longer back we reach.

The postglacial ring event lines up with beryllium in ice so - cosmic. Since it's in spaaace nobody down here knows what causes these things. Usually assumed is coronalmass ejection from our own Sun. Could be nearby supernova.

Also listed is another event 12060-11960 BC - which interests me more. This has more scholarly agreement: our Sun wasn't protecting us, from cosmic rays generally. Thus: a Maunder-type solar minimum, as (un-)sparked the Older Dryas which started in ice 12075 BC. We don't normally hear much about that compared to the drama of the Younger. Before them both was an "Oldest", the Heinrich 1 stadial - although I don't know we have the treerings for that.

I take it that when we were warming up, but not warm-enough for all the Canadian and European ice to have melted yet, we were more vulnerable to Maunders. Maunder's actual little-ice-age was bad enough.