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1“...The Oligocene diatom assemblage observed in samples from Hole 647A consists of a mixture of species...”
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2“... agglutinated foraminifers in this unit indicates an Eocene to Oligocene age. The assemblages are cosmopolitan...”
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3by Firth, John V“...During Ocean Drilling Program (ODP) Leg 105, a thick sequence of lower Eocene to lower Oligocene...”
Published 1989
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5“... in the middle Eocene early-Oligocene from four Ocean Drilling Program (ODP) sites located between 60° and 65...”
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6“... south of Greenland, while early Oligocene and early Miocene radiolarians were recovered from...”
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7“... complete, whereas the Oligocene section of Hole 628A contains three unconformities based on planktonic...”
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8“...Appreciable lower Oligocene clastic detritus interpreted to be ice-rafted debris (IRD...”
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9“...Strontium isotope (87Sr/86Sr) ages have been established for Oligocene samples of Leg 119 Site 744...”
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10“...Eocene-Oligocene radiolarians from Ocean Drilling Program Sites 699, 702, and 703, Leg 114...”
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13“... in the northeastern Atlantic Ocean. Both Mesozoic and Cenozoic sediments were recovered. Oligocene to Miocene...”
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14by Abelmann, Andrea“... recovered upper Oligocene and Neogene sequences. Based on radiolarian investigations, a biostratigraphic...”
Published 1990
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15“...Detailed calcareous nannofossil range charts for the Oligocene-Pleistocene sections from high...”
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16“... the middle Eocene and early Oligocene (~9–33 Ma). Several peaks in increased export productivity and burial...”
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20“... diversity throughout the Paleogene from the late Paleocene to the Oligocene/Miocene boundary and consist...”
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