Woodburne, M.O., (ed.), 2004. Late Cretaceous and Cenozoic Mammals of North America, Biostratigraphy and Geochronology. New York, Columbia University Press, 400 pp.
Woodhouse, C.A., and J.T. Overpeck, 1998. 2000 years of drought variability in the central United States. Bulletin of the American Meteorological Society, 79: 2693-2714.
Woodruff, D.S., 2001. Declines of biomes and biotas and the future of evolution. Proceedings of the National Academy of Sciences USA, 98: 5471-5476.
Wright, P., L. Cherns, and P. Hodges, 2003. Missing molluscs: Field testing taphonomic loss in the Mesozoic through early large-scale aragonite dissolution. Geology, 31: 211-214.
Zachos J., M. Pagani, L. Sloan, E. Thomas, and K. Billups, 2001. Trends, rhythms, and aberrations in global climate 65 Ma to Present. Science, 292: 686-693.
Zimmerman A.R., and E.A. Canuel, 2000. A geochemical record of eutrophication and anoxia in Chesapeake Bay sediments: anthropogenic influence on organic matter composition. Marine Chemistry, 69: 117-137.
Zimmerman A.R., and E.A. Canuel, 2002. Sediment geochemical records of eutrophication in the mesohaline Chesapeake Bay. Limnology and Oceanography, 47: 1084-1093.