NOAA, Earth's Past Tropical Climate🌴🍍 The episode known as the Paleocene-Eocene Thermal Maximum (PETM) occurred 55-56 million years ago. During the PETM, the GLOBAL TEMPERATURE HAD RISEN BY AS MUCH AS 5-8°C (9-14°F) to an average temperature as high as 73°F. AROUND THIS TIME MUCH OF THE CONTINENTAL UNITED STATES HAD A SUB-TROPICAL ENVIRONMENT. This fossil palm is from Fossil Butte National Monument, Wyoming. Image courtesy U.S. National Park Service. Earth’s hottest periods—the Hadean, the lat

Much of the warming of the Paleocene-Eocene thermal maximum is ... | Filo

The Paleocene-Eocene Thermal Maximum: Rapid Warming | AMNH