Figure 2. Concentrations of CaCO3, TOC, and headspace CO2 and methane in sediments from Site 1076 in the Lower Congo Basin depositional regime. Elevated C1/C2 ratios indicate microbial origins for these hydrocarbon gases.

Figure 2. Concentrations of CaCO₃, TOC, and headspace CO₂ and methane in sediments from Site 1076 in the Lower Congo Basin depositional regime. Elevated C₁/C₂ ratios indicate microbial origins for these hydrocarbon gases.