Neogene Low-Latitude Magnetostratigraphy from Site 710 and Revised Age Estimates of Miocene Nannofossil Datum Events

Ocean Drilling Program Leg 115 recovered, for the first time, a largely continuous Neogene magnetostratigraphic sequence from an equatorial environment.This sequence (Site 710) has been correlated to the geomagnetic polarity time scale by means of nannofossil biostratigraphy.When the Miocene nannofossil magnetobiochronology from Site 710 is compared with other predominantly mid-latitude magnetobiochronologies, an evaluation of consistency can be made.The results require substantial revision of the age estimates of Miocene nannofossil zonal markers, relative to the values presented in the currently accepted Neogene nannofossil chronology.