Fig. 2
Lignin, levoglucosan and stable carbon isotope results from sample STBB II – 7. (A) Lignin oxidation product (LOP) ratios (S/V vs. C/V). The shaded areas indicate experimentally determined LOP ratios associated with differing plant functional types26. (B) STBB II – 7 levoglucosan concentration plotted alongside δ13C13 (C), smoothed with a 0.25 mm running mean. Levoglucosan error bars are one standard deviation. Levoglucosan numbering corresponds to sample numbers indicated in (A) (i.e., sample 1 in (A) is an amalgamation of levoglucosan samples 1.1, 1.2, and 1.3 in (B), and so on for 2 and 3). Sampling positions are shown in Fig. 3.
