|Title||The Eocene/Oligocene Boundary Event in the Deep Sea|
|Publication Type||Journal Article|
|Year of Publication||1984|
|Authors||Corliss, BH, Aubry, M-P, Berggren, WA, Fenner, JM, Keigwin, LD, Keller, G|
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 Eocenel Oligocene boundary.