Figure F29. Age-depth plot using 112 foraminifer, nannofossil, diatom, and radiolarian age assignments for Site 1123. Because of the size of the plot, strongly or fully overlapping event positions may be obscured in the graph, seemingly accounting for fewer than 112 points. All depths are reported in mcd values. The plot of events is rather tightly clustered and shows fairly good coherence. The solid line indicates the paleomagnetic age model from "Paleomagnetism" in the "Site 1123" chapter . It approximates a remarkably constant average rate of sedimentation through the last 20 Ma of ~3.5 cm/k.y. (35 m/m.y.). No estimates are available for the amount of sediment possibly eroded during middle to late Oligocene time, following late Eocene through early Oligocene sedimentation.