350 million years
or 85 meters to today
Geological era: Paleozoic / Carboniferous
Plants form the stable substance lignin as a supporting framework and for protection. This mechanical pulp enables plants to grow tall. For a long time, there are no organisms capable of decomposing it. The plants do not rot, but turn into coal. The CO2 content of the air decreases, the oxygen content increases. Therefore insects can become very large and colonize the new forests.
Euramerica (Laurussia) and Gondwana collide to form the new supercontinent Pangaea. In Euramerica, tropical conditions prevail, while the land masses lying at the South Pole are covered by an increasingly thick ice sheet. The formation of ice causes sea levels to fall.