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Table 2 Radiocarbon ( 14 C) age data obtained with AMS for the organic carbon fractions from core Mw5S from L. Maruwan

From: Biogeochemistry and limnology in Antarctic subglacial weathering: molecular evidence of the linkage between subglacial silica input and primary producers in a perennially ice-covered lake

Depth Mid-depth Conventional radiocarbon age ( δ 13 C corrected) Calendar age (2σ range) Relative area under probability function
(cm) (years BP) ± (cal BP)  
0 to 2 1.0 1,350 40 24 to 141 0.73
     220 to 262 0.25
6 to 8 7.0 3,950 30 2,737 to 2,798 0.93
     2,819 to 2,844 0.06
10 to 12 11.0 4,200 30 2,950 to 3,160 1.00
18 to 20 19.0 3,920 40 2,706 to 2,813 0.94
     2,816 to 2,844 0.03
     2,618 to 2,633 0.03
24 to 26 25.0 4,410 30 3,256 to 3,392 1.00
32 to 34 33.0 4,630 30 3,475 to 3,637 1.00
46 to 49 47.5 4,540 40 3,382 to 3,560 1.00
70 to 75 72.5 5,220 40 3,790 to 4,053 1.00
90 to 95 92.5 5,520 90 4,056 to 4,565 1.00
105 to 110 107.5 5,400 30 4,042 to 4,274 1.00
125 to 130 127.5 5,350 40 3,950 to 4,218 1.00
150 to 156 153.0 6,010 70 4,807 to 5,204 1.00
  1. Conventional radiocarbon dating based on organic carbon values (14Corg, years BP) was corrected for the marine reservoir effect (ΔR = 1,300 years for the marine stage sequence) using core-top data. Calendar age data were calculated using the calibration programs Calib Rev 6.0.1 (Stuiver and Reimer 1993; Stuiver et al. 1998), INTCAL09 and MARINE09 (e.g., Hughen et al. 2004; Reimer et al. 2004, 2009). See discussions of the biogeochemical recycling processes for relic carbon in the Antarctic region (e.g., Ingolfsson et al. 1998; Berkman et al. 1998) and the Soya Coast region (e.g., Miura et al. 2002).