The timescale includes revisions by D. A. Meese as of Sept 1994. Depths below 167 meters are those of the D core; above 167 meters the depths are those of the B core + 1.09 meters. Layer count ages at top depths where 0 BP represents AD 1950 SUMMER to AD 1949 SUMMER. d18O measured at the Quaternary Isotope Laboratory, Univ of Washington.
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