Figure F35. Total carbon and nitrogen contents in sediments from Site 1174 and the percentage of inorganic carbon (carbonate) in sediments. A. Total organic carbon (TOC) ranges from 0.2 to 1.5 wt% in Hole 1174A. B. Nitrogen contents are low, reaching zero at 1020 mbsf. C. Carbonate concentrations are low but increase sharply below 900 mbsf, consistent with the observation of carbonate nodules in the cores.