Shirley van Heck provided a critical review of an early form of this manuscript. The authors wish to thank her as well as Giuliana Villa and José-Abel Flores for helpful reviews, which greatly improved the quality of this manuscript. The authors wish to thank Dr. Sherwood W. Wise Jr. for his willing aid and constant encouragement throughout the course of this project. We are also indebted to Kristeen L. McGonigal and Bryan C. Ladner for giving us this research opportunity as well as their patience and support. This paper was developed as an undergraduate research project at Florida State University. This research used samples and data 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 U.S. Science Advisory Committee funds to Kristeen L. McGonigal. Laboratory facilities were provided by NSF grant number DPP 94-22893.