Sample % 39Ar 37Ar/39Ar 36Ar/39Ar 40Ar*/39Ar % 40*Ar Age (Ma) SD
DMF86-141 (41B)
3174-11 0.0312 0.00012 0.5948 94.3 6.341 0.188
3174-10 0.0177 0.00022 0.6052 90.3 6.452 0.316
3174-17 0.0602 0.00021 0.5854 90.8 6.241 1.009
Weighted Mean = 6.37 +/- 0.16 SE
3174-14 0.4619 0.13965 29.1394 41.4 287.106 59.507
3174-22 0.5528 0.18004 43.5671 45.0 413.959 119.478
3174-21 0.0000 0.02415 383.9334 100.0 2139.044 44.623
DMF86-141 (Glass/41B)
5088-01A 4.2 0.1069 0.00612 1.4407 44.4 7.437 1.544
5088-01B 23.2 0.0873 0.00208 1.4215 70.0 7.338 0.260
5088-01C 33.4 0.0882 0.00121 1.4568 80.4 7.520 0.288
5088-01D 18.5 0.0899 0.00112 1.4396 81.5 7.266 0.287
5088-01E 17.8 0.0933 0.00288 1.4074 62.5 7.266 0.287
5088-01F 2.9 5.0740 0.00278 1.2476 74.0 6.442 1.517
Plateau Age = 7.38 +/- 0.14 SE
Irradiation Data
20 J=0.001428 +/- 0.000001
41B J=0.005920 +/- 0.000009
61B J=0.002783 +/- 0.000002
61A2 J=0.002844 +/- 0.000004
98A J=0.000478 +/- 0.000001