Extended Data Fig. 2: Stratigraphic background for IODP Site U1541.
From: Five million years of Antarctic Circumpolar Current strength variability
a, Age–depth plot for the Pliocene and Pleistocene sedimentary sequence at IODP Site U1541 compared with biostratigraphic and palaeomagnetic tie points25. Vertical error bars represent the depth range of each stratigraphic marker (for example, the biostratigraphic ages were determined on core catchers during the expedition). Horizontal error bars represent age uncertainties adopted from the best-fit-interval output of the constrained optimization analysis of Southern Hemisphere biostratigraphic datasets. Palaeomagnetic ages are based on the geomagnetic timescale GTS2012. Further details are discussed in the methods section of ref. 54. b, Benthic δ18O record from IODP Site U1541 tuned to the Prob-stack26,56, shown here in comparison with the LR04 stack10. c, Sedimentation-rate record at Site U1541. d, ACC strength record at IODP Site U1541.
