Table 2 Application of a two-endmember mixing model to the measured Δ 14C values in ten paleosol samples.

From: Accumulation of radiocarbon in ancient landscapes: A small but significant input of unknown origin

Paleosol

Depth (cm)

TOC (wt%)

1/TOC

FM

Modern C (%)

Error ± (%)

Lakim

0

0.26

3.80

0.057

1.70

0.19

Lakim

25

0.09

11.21

0.136

1.56

0.19

Lakim

50

0.14

7.07

0.080

1.00

0.19

Lakim

75

0.24

4.23

0.055

1.36

0.19

Lakim

100

0.03

30.86

0.181

2.36

0.19

Luca

22

0.01

71.43

0.232

0.32

1.84

TC

0

0.17

5.87

0.028

0.47

0.19

TC

25

0.15

6.80

0.028

0.55

0.19

TC

50

0.23

4.35

0.024

0.61

0.19

TC

100

0.08

11.82

0.062

0.71

0.33

  1. TOC, Total organic carbon, measured at UC Irvine; FM, Fraction modern; Modern C, modelled abundance of modern carbon in bulk paleosol samples, representing the estimated percent of modern carbon within bulk samples.
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