Figure F2. Late Cretaceous and Paleogene biochronology and the magnetic polarity time scale used as the reference standard for assigning magnetic polarity chrons to magnetostratigraphy of Leg 171 sites. The Paleogene portion is modified after Berggren et al. (1995), and the Late Cretaceous section is modified from Erba et al. (1995) and Shipboard Scientific Party (1998a). In the Polarity column, white bands = reversed-polarity chrons and black bands = normal-polarity chrons.