Figure 3. Comparison of lithologies recovered at ODP Site 1002 and DSDP Site 147 at approximately the same location, but separated by 26 yr of drilling technology. At both sites a virtually identical sediment sequence was recovered, although the rotary-cored Hole 147 was highly disturbed with little preserved evidence of sediment laminations. The diatom-rich interval centered at ~118 mbsf at ODP Site 1002 was missed in original core descriptions and was not formally defined as a subunit. The scientific party of DSDP Leg 15 identified a rhythmic pattern of sedimentation at Site 147, which was postulated to reflect late Quaternary glacial-interglacial cycles of climate and sea level. The available stratigraphic framework for that site, however, was never sufficient to evaluate that hypothesis.