The Gulf of Mexico in the Yucatan area is supposed to be a meteor crater. That would be a large enough cataclysm. But that was many many moons ago. The time line likely doesn't fit.
I used to wonder why geodes were turning up in Tampa Bay.
Fla. is a big limestone rock with no volcanic past of which I'm aware.
Yeah, Chixsulub was ~65 MY ago. There was a strike in Bolivia about 10 KY ago, but that's too far away. Chesapeake was also ~50-60 MY, as was Manson.
Thing is, any cataclysm big enough would have left clear traces, since the timeframe is within 4 KY, probably, since it's unlikely that there would have been Olmec pyramids much before that.