Phanerozoic temperature history. PhanDA reconstructed GMST for the past 485 million years. Black line shows the median, shading corresponds to the ensemble percentile.

The Phanerozoic Eon is divided into the three eras. The oldest is the Paleozoic Era, which means ‘ancient life’ and occurred between 541 and 252 million years ago.

I am interested in understanding how marine ecosystems responded to major biological and environmental changes of the past, particularly those associated with global warming and the mass extinction ...

Eons are the broadest category. From oldest to youngest, they are the Hadeon, Archean, Proterozoic, and Phanerozoic eons. Each eon is subdivided into eras. The Phanerozoic Eon is divided into the ...