Details of figure 1. Previous DSDP/ODP site designations are in parantheses. The nitrate concentration of the sediment pore water of Site 1225 and Site 1231 are shown in figure 3. Site 1225 is located W of the East Pacific Rise spreading center and Site 1231 W of the subduction zone of the Peru margin (from D'Hondt et al., 2003 , used with permission of IODP).
Holm and Neubeck Geochemical Transactions 2009 10:9 doi:10.1186/1467-4866-10-9