Fig. 2: Organic geochemical proxies from core PI-NC-1. | Communications Earth & Environment

Fig. 2: Organic geochemical proxies from core PI-NC-1.

From: Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

Fig. 2

Total organic carbon, total nitrogen, total n-alkane abundance, C/N mass ratio, nitrogen and carbon stable isotopes of bulk organic matter, and compound-specific carbon stable isotopes for mid- and long-chain n-alkanes plotted against time and the corresponding archeological periods. Date uncertainties from our age-depth model at the boundaries of Zone 2 (black dashed lines) are shown with box and whisker plots, in which the weighted means are represented by red boxes and the 95% ranges by whiskers.

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