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Swiss Journal of Geosciences

Table 2 Cosmogenic 10Be data and exposure ages of the granitic samples

From: Timing of retreat of the Reuss Glacier (Switzerland) at the end of the Last Glacial Maximum

10Be sample name

Quartz dissolved (g)

9Be spike (mg)

Measured 10Be/9Be × 10−14

AMS error (%)

10Be (104 atoms/g)

Exposure age (ka) erosion corrected (ε = 1.0 mm/ka)

Reuss-20

50.3283

0.1943

43.4

4.8

11.16 ± 0.54

18.6 ± 0.9 (1.3)

Reuss-21

50.3933

0.1989

47.3

3.9

12.44 ± 0.49

22.0 ± 0.9 (1.4)

Reuss-22

47.1577

0.1995

46.5

4.4

13.11 ± 0.58

22.2 ± 1.0 (1.5)

Rigi-1

40.2384

0.1994

52.1

4.1

15.64 ± 0.65

16.2 ± 0.7 (1.0)

Rigi-2

40.0631

0.2049

24.4

4.1

7.48 ± 0.33

7.8 ± 0.4 (0.5)

Rigi-3

45.3952

0.1679

32.5

5.7

8.03 ± 0.46

13.0 ± 0.8 (1.0)

Rigi-4

46.3604

0.1678

22.1

5.3

5.36 ± 0.28

8.7 ± 0.5 (0.6)

  1. AMS measurement errors are at 1σ level, including the statistical (counting) error and the error due to normalization of standards and blanks. The error weighted average 10Be/9Be full process blank ratio is (2.90 ± 0.33) × 10−15. Exposure ages are calculated with the CRONUS-Earth exposure age calculator (http://hess.ess.washington.edu/math/; v.2.2; Balco et al. 2009 and were updated from v.1 to v. 2.2 as published by Balco in October 2013). Exposure ages are corrected for shielding of surrounding topography, and sample thickness, as explained in the text; the uncertainties reported in parentheses also include the production rate error. 2.65 g/cm3 for rock density and a half-live of 1.39 MA for 10Be (Korschineck et al. 2010; Chmeleff et al. 2010) are used for the age calculations
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