This goes farther back than archaeology topics, but still, it's fascinating: the late Miocene was relatively recent (10.4 to 5 million years ago). Exquisitely Preserved Fossil Forest Uncovered in Japan. The story is in Science Alert, and I think sometimes it throws up a paywall.

The forest was first seen in modern times during a severe drought in 1994, when roughly 400 fossilized tree stumps emerged from the water.

Most of the stumps have since been submerged once more, but researchers have successfully examined 137 of them, and the surrounding fossilized leaves.

They've now published their analysis of the site and provided a picture of the plants that once covered the wooded area.

They could build a coffer dam in the area if they really want to work on it.

This forest offers a rare opportunity because one type of trunk and one type of leaf were clearly dominant in the area. Of the 137 stumps examined, 130 were identified as Wataria parvipora.

Apparently all of the scientific names that things were called by were decided based upon particular items found individually, not together with other parts of the plant. So different parts of the plant found at different times or places received other names. Now they have to fit it all together.