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- Chapter contents
- Abstract
- Introduction
- Material and methods
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Results and discussion
- Summary
- Acknowledgments
- References
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Figures
- F1. Location map.
- F2. Site U1331 paleomagnetic and physical property data.
- F3. Digital line scan images, Site U1331.
- F4. Growth factor, Site U1331.
- F5. Site U1332 paleomagnetic and physical property data.
- F6. Digital line scan images, Site U1332.
- F7. Growth factor, Site U1332.
- F8. Site U1333 paleomagnetic and physical property data.
- F9. Digital line scan images, Site U1333.
- F10. Growth factor, Site U1333.
- F11. Site U1334 paleomagnetic and physical property data.
- F12. Digital line scan images, Site U1334.
- F13. Growth factor, Site U1334.
- F14. Site 1218 paleomagnetic and physical property data.
- F15. Digital line scan images, Site 1218.
- F16. Growth factor, Site 1218.
- F17. Site 1219 paleomagnetic and physical property data.
- F18. Digital line scan images, Site 1219.
- F19. Site 1220 paleomagnetic and physical property data.
- F20. Digital line scan images, Site 1220.
- F21. Growth factor, Site 1220.
- F22. Site-to-site correlation on Site 1218 scale.
- F23. Site-to-site correlation on Site 1220 scale.
- F24. Linear sedimentation rates.
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Tables
- T1. Revised splice tie points, Site U1331.
- T2. Revised composite depths, Site U1331.
- T3. Mapping pairs, Site U1331.
- T4. Turbidites, Site U1331.
- T5. Revised composite depths, Site U1332.
- T6. Revised splice tie points, Site U1332.
- T7. Mapping pairs, Site U1332.
- T8. Revised composite depths, Site U1333.
- T9. Revised splice tie points, Site U1333.
- T10. Mapping pairs, Site U1333.
- T11. Revised composite depths, Site U1334.
- T12. Revised splice tie points, Site U1334.
- T13. Mapping pairs, Site U1334.
- T14. Revised offset, Site 1218.
- T15. Tie points, Site 1218.
- T16. Mapping pairs, Site 1218.
- T17. Tie points, Site 1219.
- T18. Revised offset, Site 1219.
- T19. Revised offset, Site 1220.
- T20. Tie points, Site 1220.
- T21. Mapping pairs, Site 1220.
- T22. Cleaned magnetic susceptibility and GRA, Site U1331.
- T23. Cleaned magnetic susceptibility and GRA, Site U1332.
- T24. Cleaned magnetic susceptibility and GRA, Site U1333.
- T25. Cleaned magnetic susceptibility and GRA, Site U1334.
- T26. Cleaned magnetic susceptibility and GRA, Site 1218.
- T27. Cleaned magnetic susceptibility and GRA, Site 1219.
- T28. Cleaned magnetic susceptibility and GRA, Site 1220.
- T29. Correlation of sites to Site 1218.
- T30. Correlation of sites to Site 1220.
- T31. Revised magnetochrons.
- T32. Site U1331 radiolarian datums.
- T33. Site U1332 radiolarian datums.
- T34. Site U1333 radiolarian datums.
- T35. Site U1334 radiolarian datums.
- T36. Site 1218 radiolarian datums.
- T37. Site 1219 radiolarian datums.
- T38. Site 1220 radiolarian datums.
- T39. Site U1331 calcareous nannofossil datums.
- T40. Site U1332 calcareous nannofossil datums.
- T41. Site U1333 calcareous nannofossil datums.
- T42. Site U1334 calcareous nannofossil datums.
- T43. Site 1218 calcareous nannofossil datums.
- T44. Site 1219 calcareous nannofossil datums.
- T45. Site 1220 calcareous nannofossil datums.
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doi:10.2204/iodp.proc.320321.201.2012
Summary
We revised the shipboard composite sections of Sites U1331, U1332, U1333, and U1334 from Expedition 320 and Sites 1218, 1219, and 1220 from Leg 199 using shipboard magnetic susceptibility data, GRA bulk density data, natural remanent magnetization data, and core images. Drilling distortions in cores are compensated by differential squeezing and stretching of parallel cores outside the splice at all investigated sites. This is of major importance because we want to integrate all available data from all drilled holes. A detailed site-to-site correlation was performed. We linked the revised composite sections of Sites U1333, U1334, and 1219 to the corrected rmcd of Site 1218. Sites U1331 and U1332 were correlated to the revised composite record of Site 1220. We chose Sites 1218 and 1220 as reference sites because of their stratigraphic completeness. The decimeter-scale correlation was used to integrate and transfer paleomagnetic and biostratigraphic information. Our integrated stratigraphic framework presented here can be used as the backbone for the late Eocene, Oligocene, and early Miocene intervals of the equatorial Pacific Cenozoic megasplice. Because of the presence of clear paleomagnetic records and decimeter-scale cyclic features, the investigated sediments are exceptionally suitable for further working on cyclostratigraphy and orbital tuning. The integration of Expedition 320 and Leg 199 data has the potential to substantially improve the existing geological timescale (Gradstein et al., 2004) and even extend the astronomically calibrated timescale (Lourens et al., 2004; Pälike et al., 2006) far back into the Eocene.
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