Figure F57. Sediment chemical parameters, Hole U1419A. A. Total organic carbon (TOC, wt%). B. Total nitrogen (TN, wt%). C. Total organic carbon to total nitrogen (C/N) ratio. D. Calcium carbonate (CaCO3, wt%). E. TOC-TN scatter plot (the intersection of the linear regression line and the y-axis (TN) gives an indication of the potential contribution of inorganic N to the TN signal; e.g., Schubert and Calvert, 2001).
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