Just realized I didn't answer all of your questions. The sea level was likely 50 to 100 meters higher than today: https://pdfs.semanticscholar.org/db73/f8e134ab

Just realized I didn't answer all of your questions. The sea level was likely 50 to 100 meters higher than today: https://pdfs.semanticscholar.org/db73/f8e134ab32476aa08b3c05dd881a0f611555.pdf https://pdfs.semanticscholar.org/db73/f8e134ab32476aa08b3c05... It was really warm, not sure on the exact number off the top of my head but at least 10-15 degrees C warmer in high latitudes than today. It was essentially an ice free world. And during the PETM event itself, the temperatures rose another 5 to 8 degrees C: https://dspace.library.uu.nl/bitstream/handle/1874/385777/Extreme_warming.pdf?sequence=1 https://dspace.library.uu.nl/bitstream/handle/1874/385777/Ex...