Initial Reports, Volume 200 Ms 200-103 Chapter 3, Table T16. Ages of lithologic units, Hole 1223A. Note: Ages are calculated by linear interpolation between identified polarity reversals. Lithologic unit Top boundary depth (mbsf) Bottom boundary depth (mbsf) Top age (Ma) Bottom age (Ma) 1 0.00 5.11 0.00 1.88 2 5.11 7.32 1.88 1.95 3 7.32 7.90 1.95 1.97 4 7.90 10.78 1.97 2.04 5 12.70 15.06 2.08 2.14 6 15.06 15.29 2.14 2.14 7 15.29 16.10 2.14 >2.15 8 22.30 22.80 9 22.80 22.91 10 22.91 24.92 11A 32.00 33.00 11B 33.00 36.99 12 36.99 37.47 13 37.47 38.31 14 38.31 38.70 <2.58