Figure F18. A. Sequential depth plots of raw reflectance data for Site 1241. B. First derivatives for Site 1240. Red lines = absorption features typical of organic pigments (i.e., 410 and 650 nm). C. The depth of the absorption feature at 650 nm, estimated relative to 630 and 700 nm and normalized to a measure of the general slope of the spectrum, is plotted with depth as a proxy for chlorin abundance.

Figure F18. A. Sequential depth plots of raw reflectance data for Site 1241. B. First derivatives for Site 1240. Red lines = absorption features typical of organic pigments (i.e., 410 and 650 nm). C. The depth of the absorption feature at 650 nm, estimated relative to 630 and 700 nm and normalized to a measure of the general slope of the spectrum, is plotted with depth as a proxy for chlorin abundance.