Site 445, Daito Ridge, Deep Sea Drilling Project Leg 58

Klein, G. deVries; Kobayashi, Katsura

doi:10.2973/dsdp.proc.58.105.1980

Initial Reports of the Deep Sea Drilling Project 1980

DOI: 10.2973/dsdp.proc.58.105.1980

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Site 445, Daito Ridge, Deep Sea Drilling Project Leg 58

G. deVries Klein¹,

Katsura Kobayashi²

Abstract: Site 445 is in a small basin in the Daito Ridge, northwest Philippine Sea. Sediments range in age from middle Eocene to Pleistocene, and the cored interval is 892 meters thick. A hiatus in sedimentation occurred during early Oligocene. Occurrence of Nummulites boninensis is limited to resedimented debris-flow conglomerate beds. The carbonate sediments, mudstones, sandstones, and con

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1998

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Application of the Modern Analog Technique (MAT) of Sea Surface Temperature Estimation to Middle Pliocene North Pacific Planktonic Foraminifer Assemblages

Dowsett¹,

Robinson

1998

Palaeontologia Electronica

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Seventy-two samples from Deep Sea Drilling Project Sites 445 and 463 and Ocean Drilling Program Site 769 from the northwest Pacific Ocean were compared to 499 modern core top Pacific Ocean samples using the squared chord distance dissimilarity measure. Many samples show high levels of dissimilarity that can be explained by pervasive dissolution and/or evolution changing the composition of the fossil assemblages. Weighted averages of winter and summer sea surface temperatures (SST) from the nearest five modern analogs of each fossil-bearing sample were used to estimate Pliocene SST. Results show little to no middle Pliocene warming at low latitudes (Site 769) and warming of 2°C to 4°C in winter and possibly 1°C in summer just north of the Philippine Sea (Site 445). These data, when combined with other estimates of Pliocene SST in the northwest Pacific, suggest an enhanced meridional oceanic heat flow, similar to that found in the North Atlantic during the same part of the Pliocene.

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Application of the Modern Analog Technique (MAT) of Sea Surface Temperature Estimation to Middle Pliocene North Pacific Planktonic Foraminifer Assemblages

Dowsett¹,

Robinson

1998

Palaeontologia Electronica

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show abstract

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Site 445, Daito Ridge, Deep Sea Drilling Project Leg 58

Cited by 1 publication

References 9 publications

Application of the Modern Analog Technique (MAT) of Sea Surface Temperature Estimation to Middle Pliocene North Pacific Planktonic Foraminifer Assemblages

Application of the Modern Analog Technique (MAT) of Sea Surface Temperature Estimation to Middle Pliocene North Pacific Planktonic Foraminifer Assemblages

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