Age determination and stable oxygen isotope record of ODP Hole 167-1017E, supplement to: Kennett, James P; Roark, E Brendan; Cannariato, Kevin G; Ingram, B Lynn; Tada, Ryuji (2000): Latest Quaternary paleoclimatic and radiocarbon chronology, Hole 1017E, southern California Margin. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 249-254

Oxygen isotopic (d18O) climatic stratigraphy and radiocarbon chronology, at high resolution, have been used to establish an age model for Ocean Drilling Program Hole 1017E, a continuous 25-m sequence of hemipelagic sediments from the continental slope (956 m water depth), east of Point Arguella, Sou...

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Bibliographic Details
Main Authors: Kennett, James P, Roark, E Brendan, Cannariato, Kevin G, Ingram, B Lynn, Tada, Ryuji
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2000
Subjects:
Drilling/drill rig
Leg167
Joides Resolution
Ocean Drilling Program ODP
Greenland
Kennett
ice core
Online Access:https://dx.doi.org/10.1594/pangaea.774023
https://doi.pangaea.de/10.1594/PANGAEA.774023
Description
Summary:Oxygen isotopic (d18O) climatic stratigraphy and radiocarbon chronology, at high resolution, have been used to establish an age model for Ocean Drilling Program Hole 1017E, a continuous 25-m sequence of hemipelagic sediments from the continental slope (956 m water depth), east of Point Arguella, Southern California. The upper part of Hole 1017E from ~33 ka (7.445 mbsf) was dated using 13 calendar-corrected radiocarbon ages of mixed planktonic foraminiferal assemblages. Benthic oxygen isotopic stratigraphy records a continuous 130-k.y. sequence ranging from marine isotope Stage 6 to the present day. The benthic d18O curve, representing the last two interglacial and glacial cycles, closely resembles the well-dated, deep-sea reference sequence, providing a detailed chronologic framework. Sedimentation rates remained relatively constant throughout the sequence at ~18 cm/k.y. and were sufficiently rapid to provide considerable potential for high-resolution paleoceanographic/paleoclimatic investigations.Planktonic foraminiferal oxygen isotopic stratigraphy based on the surface-dwelling form Globigerina bulloides defines an almost complete sequence of interstadial/stadial oscillations (Dansgaard/Oeschger cycles [D/O]). Combined use of radiocarbon chronology, deep-sea oxygen isotopic datums, and visual pattern matching has enabled us to identify the sequence of D/O cycles as described for the Greenland (GRIP2) ice core. This has strengthened the stratigraphic framework for the last 60 k.y. in the sequence as a basis for further paleoenvironmental investigations.

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