Table 2 K-Ar ages performed on groundmass separate of sample 15SAN-A (a 3-kg black glassy andesite lithic block from unit C of the Minoan Tuff).

From: Towards reconstruction of the lost Late Bronze Age intra-caldera island of Santorini, Greece

Sample

40Ar* (%)

40Ar* (×1010 at./g)

Age ± 1σ (ka)

15SAN-A

0.6

4.1278

18.7 ± 3.1

(K%: 2.11 ± 0.02)

1.0

4.4882

20.4 ± 2.0

 

1.1

4.7406

21.5 ± 2.0

 

1.0

4.4235

20.1 ± 2.0

 

1.0

4.2728

19.4 ± 2.0

  

Weighted mean:

20.2 ± 1.0

  1. Column headings indicate concentration of radiogenic 40Ar (40Ar*) in percent; concentration of radiogenic 40Ar (40Ar*) × 1010 in number of atoms per gram; age ± 1-sigma uncertainty of each measurement (in ka), and weighted mean age and uncertainty (see text)40,41,42,43,44,45.
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