Figure F25. A. Carbonate accumulation rates at Sites 1236–1238 and 1241, calculated as the product of weight percent CaCO3, sedimentation rate, and dry bulk density. The shipboard magnetostratigraphy and biostratigraphy were used to calculate sedimentation rates that were smoothed to avoid overinterpretations of the preliminary age model. B. Annual chlorophyll-a concentrations (mg/m3; http://seawifs.gsfc.nasa.gov), site locations, and tectonic backtrack. Red dots = paleoposition of sites from ~4 to 8 Ma.
