Umino, Susumu (1995): Downhole variations in grain size at Hole 504B; implications for rifting episodes at mid-ocean ridges. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Becker, Keir, Graham, Anne Gilbert, Alt, Jeffrey C., Bayhurst, Gregory, Christaras, Basil G., Gable, Robert, Krammer, Anton, Magenheim, Andrew J., Morin, Roger H., Solbau, Raymond, Foss, Glen N., Pollard, Eugene, Erzinger, Joerg A., Dick, Henry J. B., Stokking, Laura B., Agrinier, Pierre, Allerton, Simon, Boldreel, Lars O., Fisk, Martin R., Harvey, Peter K. H., Iturrino, Gerardo J., Johnson, Kevin T. M., Kelley, Deborah S., Kepezhinskas, Pavel K., Laverne, Christine, Marton, Frederic C., McNeill, Andrew W., Naslund, Howard R., Pariso, Janet E., Pertsev, Nikolai N., Pezard, Philippe, Schandl, Eva S., Sparks, Joel W., Tartarotti, Paola, Umino, Susumu, Vanko, David A., Zuleger, Evelyn, Marin, Jennifer A. (editor), Proceedings of the Ocean Drilling Program, scientific results, Costa Rica Rift; covering legs 137 and 140 of the cruises of the drilling vessel JOIDES Resolution; Leg 137, Honolulu, Hawaii, to Balboa, Panama, Site 504, 20 March-1 May, 1991; Leg 140, Victoria, Canada, to Balboa, Panama, Site 504, 11 September-12 November 1991, 137/140, 19-33, georefid:1998-071165