Figure F7. Correlation of middle Miocene tephra horizons from ODP Holes 747A and 1138A. Red bars in core recovery columns = position of tephra horizons (Morche et al., 1992; Coffin, Frey, Wallace, et al., 2000). Hole 747A diatom and magnetostratigraphic data are compiled from Harwood and Maruyama (1992), Harwood et al. (1992), Heider et al. (1992), and Ramsay and Baldauf (1999). Magnetostratigraphy for Hole 747A is interpreted from inclination data presented in Heider et al. (1992). LCAD = last common abundant datum, LO = last occurrence, FO = first occurrence.

Figure F7. Correlation of middle Miocene tephra horizons from ODP Holes 747A and 1138A. Red bars in core recovery columns = position of tephra horizons (Morche et al., 1992; Coffin, Frey, Wallace, et al., 2000). Hole 747A diatom and magnetostratigraphic data are compiled from Harwood and Maruyama (1992), Harwood et al. (1992), Heider et al. (1992), and Ramsay and Baldauf (1999). Magnetostratigraphy for Hole 747A is interpreted from inclination data presented in Heider et al. (1992). LCAD = last common abundant datum, LO = last occurrence, FO = first occurrence.