Bioturbation of deep-sea sediments: Oxygen isotopes and stratigraphic uncertainty

摘要: Oxygen isotope analysis of two species planktonic Foraminifera in deep-sea core RC17–69 reveals a discrepancy more than 8 cm the depth Termination II within core, indicating stratigraphic about 4,500 yr. A numerical model bioturbation, which incorporates variations relative abundances species, is used to explain this discrepancy. Model results suggest that abundance contributes uncertainty and therefore should be considered interpretation oxygen record.