Figure 6.

Comparison of spectrophotometric reflectance (L) data from MD95-2034 with central GRIP δ¹⁸O data (37) and Antarctic Vostok δD data (66) (ice cores being plotted on time scales developed by the authors of refs. 60 and 62. Note that although the SPECMAP marine δ¹⁸O record is reference for all time scales (beyond the range of layer-counting and radiocarbon measurements), time scales are independently developed by correlation to major features that are not well developed during isotope stage 3. Hence, relative errors of several thousand years may occur for any one of these time scales, and it is not expected that the same interstadial events will be assigned exactly the same age for each time scale. Identification of interstadials is based upon subjective pattern recognition.