Early Eocene massive and permanent decline of morozovellids

Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic.

Growth of the first permanent Antarctic ice sheets at the Eocene-Oligocene Transition (EOT), ∼33.7 million years ago, indicates a major climate shift within long-term Cenozoic cooling. The driving mechanisms that set the stage for this glaciation event are not well constrained, however, owing to large uncertainties in temperature reconstructions during the Eocene, especially at lower latitudes....

Terrestrial cooling in Northern Europe during the eocene-oligocene transition.

Geochemical and modeling studies suggest that the transition from the "greenhouse" state of the Late Eocene to the "icehouse" conditions of the Oligocene 34-33.5 Ma was triggered by a reduction of atmospheric pCO2 that enabled the rapid buildup of a permanent ice sheet on the Antarctic continent. Marine records show that the drop in pCO2 during this interval was accompanied by a significant dec...

Decline of coral reefs during late Paleocene to early Eocene global warming

Heterogeneity in global vegetation and terrestrial climate change during the late Eocene to early Oligocene transition

Rapid global cooling at the Eocene - Oligocene Transition (EOT), ~33.9-33.5 Ma, is widely considered to mark the onset of the modern icehouse world. A large and rapid drop in atmospheric pCO2 has been proposed as the driving force behind extinctions in the marine realm and glaciation on Antarctica. However, the global terrestrial response to this cooling is uncertain. Here we present the first ...

Lithostratigraphy ,biostratigraphy of Paleocene-lower Eocene squences in Dezful embeyment, South West Iran

Paleocene and  Lower Eocene deposits in SW Iran are known as Pabdeh formation.Pabdeh formation is one of the most important lithostratigraphy unit as source rock has been deposited in Zagros basin over an extremely long period in time. The area under research is the Ghachsaran 55 subsurface Section located  from the Ghachsaran oil field in Dezful embeyment in zagros fold zone. The Lower boundry...