A recent study reveals a significant drop in global sea levels, approximately 30 meters, between 15 and 6 million years ago. This was caused by a 35% reduction in oceanic crust production, leading to a slowdown in seafloor spreading and basin deepening. The decreased volcanic activity associated with this slowdown also contributed to global cooling and further sea level reduction, possibly by an additional 60 meters. This research, supported by geological data from coastal deposits, highlights the interconnectedness of tectonic activity, climate, and sea level changes throughout Earth's history, offering valuable context for understanding modern climate change.

Prepared by Olivia Bennett and reviewed by editorial team.