Table T6. Sr isotope data at Double Trouble site. (See table note.)

Depth Material Sr value Corrected
standards		 Error Age
(Ma)		 McArthur McArthur
corrected
(ft) (m)
461 140.5 Shell 0.707739 0.707753 0.000008
0.707746 37–41
467.8 142.6 Shell 0.707724 0.707738 0.000005
0.707731 39–41
845.6 257.7 Shell 0.707940 0.707954 0.000008 61.4 0.707947 31.1
846.1 257.9 Shell 0.707871 0.707885 0.000006 64.5 0.707878 32.8
855 260.6 Shell 0.707863 0.707877 0.000007 64.8 0.707870 33
856 260.9 Shell 0.707840 0.707854 0.000007 65.9 0.707847 33.3

Note: McArthur = McArthur et al., 2001.