I remember some years ago, think it was on The Discovery channel either a separate meteorite hit that area after the massive meteorite that hit the present day Yucatan Peninsula or a chunk of that meteorite hit what is now the present Everglades are. I’m not an expert but it would seem to me to explain why there are often so many issues with sinkholes in the Everglades.
That would make sense.
an impact +-800k ago would be too long for sink holes. they happen rather naturally from what I understand but a more recent explanation would be that they are like the carolina bays impact craters that are generally linked to the younger dryas impact of 12,000 years ago that killed off the megafauna. https://bit.ly/3008Wu0