Figure 1. Location of Huguangyan Maar Lake. Solid arrows indicate the dominant direction of the summer monsoon (yellow) and winter monsoon (white). The inset photo shows Huguangyan Lake. Background image is modified from NASA (http://visibleearth.nasa.gov).
2.2 Chronology
The sedimentary chronology for Huguangyan Maar Lake is based on 14 AMS14C dates from handpicked leaves and/or other terrestrial plant macrofossils, together with analyses of137Cs and 210Pb concentrations (Table 1; Figure 2; Supplementary Figure S1). The results of radiometric dating (137Cs, 210Pb, AMS14C) have been presented previously (Chu et al., 2017; Wang et al., 2016).
Table 1. Radiocarbon ages from Huguangyan Maar Lake.