I would like to thank ODP for the opportunity to participate in Leg 170 as a paleontologist. I am grateful to Eli Silver and Gaku Kimura, the Leg 170 co-chiefs, for their leadership during Leg 170 and the rest of the scientific staff for the camaraderie and spirit in which they undertook this scientific endeavor. It was a pleasure to work with each of them. The same can be said about the technical staff and crew aboard the JOIDES Resolution. Thanks is also due to Marino Protti for organizing and leading a field trip to the ophiolite complex on the Nicoya Peninsula during our postcruise meeting. Woody Wise allowed full use of his laboratory for postcruise studies, and I thank him greatly for that. I would also like to thank Jason Chipps and Andy Feldman for slide preparation and Barbara Bruno for proofreading the galley proof. Last, but certainly not least, I am always appreciative of the ODP staff at College Station, Texas. This paper benefited from the reviews by Wuchang Wei, Diane Winter, and Woody Wise. This study was supported by a grant from USSAC.