Figure 2. Concentrations of organic carbon in Miocene, Pliocene, and Pleistocene sediments from Site 974 in the Tyrrhenian Basin, Site 975 on the Menorca Ridge, and Sites 976, 977, and 979 in the Alboran Basin. Organic-carbon depth-profiles for the five sites are ordered from east to west to show geographical change in organic-carbon concentrations.

Figure 2. Concentrations of organic carbon in Miocene, Pliocene, and Pleistocene sediments from Site 974 in the Tyrrhenian Basin, Site 975 on the Menorca Ridge, and Sites 976, 977, and 979 in the Alboran Basin. Organic-carbon depth-profiles for the five sites are ordered from east to west to show geographical change in organic-carbon concentrations.