Figure F25. MST, paleomagnetic, and biostratigraphic data from Site 1218 and Site 1219 plotted on a common timescale (developed mainly from paleomagnetic reversal datums that were composited from both sites after matching of lithologic cycles). Note the close correspondence between MST data from the two drill sites and calculated sedimentation rates. Biostratigraphic nannofossil datums and their uncertainty intervals agree well, whereas datums based on certain foraminifera do not agree. Gray-shaded boxes = ages of magnetic reversals (Cande and Kent, 1995). VGP = virtual geomagnetic pole. GRA = gamma ray attenuation.
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