title: The Eocene/Oligocene boundary event in the deep sea.
abstract: 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.
authors.forename: B H
authors.initials: BH
authors.lastname: Corliss
authors.forename: M P
authors.initials: MP
authors.lastname: Aubry
authors.forename: W A
authors.initials: WA
authors.lastname: Berggren
authors.forename: J M
authors.initials: JM
authors.lastname: Fenner
authors.forename: L D
authors.initials: LD
authors.lastname: Keigwin
authors.forename: G
authors.initials: G
authors.lastname: Keller