Figure F29. Comparison of diatom events (>5% diatoms in the sediments) to estimated position of equator crossings in lower Oligocene–lower Eocene sediments from the 56-Ma transect. Equator crossings have been estimated by shipboard paleomagnetics and by using a fixed hotspot model of Pacific plate motion. Diatom events are not clustered at equator crossings. F.Z. = fracture zone