Tiedemann, R., Sturm, A., Steph, S., Lund, S., & Stoner, J. (2007). Astronomically calibrated timescales from 6 to 2.5 Ma and Benthic Isotope Stratigraphies, sites 1236, 1237, 1239, and 1241. : College Station, Tex. : Ocean Drilling Program, Texas A & M University.