No.

Sample

206/204

207/204

208/204

Т (m. years)

238U/204Pb

1

К-2012

17.222

15.344

37.217

556

8.86

2

4062

17.243

15.389

37.368

633

9.06

3

4081

17.263

15.404

37.417

648

9.13

4

4071

17.243

15.383

37.349

621

9.03