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Eocene

Hierarchy:Phanerozoic Cenozoic  Paleogene
   Eocene
Classification:Epoch (as per International Commission on Stratigraphy)
Top:33.9 Ma
Base:56.0 Ma
Preceeds:Oligocene Rupelian
Follows:Paleocene Thanetian
Primary Divisions:PriabonianBartonianLutetianYpresian
Moderate, cooling climate.

Archaic mammals (e.g. Creodonts, Condylarths, Uintatheres, etc.) flourish and continue to develop during the epoch. Appearance of several "modern" mammal families. Primitive whales diversify. First grasses.

Reglaciation of Antarctica and formation of its ice cap; Azolla event triggers ice age, and the Icehouse Earth climate that would follow it to this day, from the settlement and decay of seafloor algae drawing in massive amounts of atmospheric carbon dioxide, lowering it from 3800 ppmv down to 650 ppmv.

End of Laramide and Sevier Orogenies of the Rocky Mountains in North America. Orogeny of the Alps in Europe begins. Hellenic Orogeny begins in Greece and Aegean Sea.
 

Geologic Events

Event NameTypeAgeArea
Popigai ImpactImpact Event35.7 ± 0.2 MaAnabarskii massif, Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai), Eastern-Siberian Region, Russia
Kerguelen Plateau formation (concludes)Volcanic Activity119 - 34 MaSouthern Indian Ocean
Pangaea breakup (concludes)Continental Breakup175 - 55 MaGlobal
Andean orogeny (ongoing)OrogenyMaximum Age: 200 MaSouth America
Laurasia supercontinent (concludes)Supercontinent215 - 55 MaNorthern Hemisphere


Overview of geological time

List all geological events
Mineral and/or Locality  
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