This research used samples provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. Funding for this research was provided by the E.U. 5th framework DeepBUG project (Grant EVK3-1999-00088). RWM acknowledges postcruise research support from the U.S. Science Support Program. We thank ODP for allowing us to obtain samples during Leg 185 and, specifically, shipboard scientist David Smith, who was involved with actual sample collection.