Hole 735B is located on a ~200-km-long transverse ridge along the eastern wall of the Atlantis II transform valley (Fig. F1). This hole is on the south end of a steep-sided, flat-topped bank, roughly 9 km north-to-south by 4 km east-to-west, that rises some 5 km above the transform valley floor (Fig. F2). See the Leg 176 Initial Reports volume and references therein for complete documentation of the tectonic setting of the Atlantis II bank (Dick, Natland, Miller, et al., 1999). The shipboard science party documented 457 igneous intervals and six major lithostratigraphic units during the Leg 176 description process (Fig. F3).