The Eocene/Oligocene boundary event in the deep sea
Analysis of middle Eocene to early Oligocene calcareous and siliceous microfossils shows gradual biotic changes with no massive extinction event across the Eocene/Oligocene boundary. Biotic changes in the late Paleogene appear to reflect changing paleoclimatic and paleoceanographic conditions and do not support suggestions of a catastrophic biotic event caused by a bolide impact at the Eocene/Oligocene boundary.
|The Eocene/Oligocene boundary event in the deep sea
|B.H. Corliss, M.-P. Aubry, W.A. Berggren, J.M. Fenner, L.D. Keigwin, G. Keller
|USGS Publications Warehouse