4. Ion microprobe U-Pb measurements on a fossil tooth gave the values in the table below (Sano and Terada, 1999). What is the age of this tooth? Table 1. U-Pb measurements on a fossil tooth. Sample I.D. 1234 238U/204Pb 206Pb/204Pb 36.7 8.82 26.4 5.95 57.8 13.99 78.8 17.30

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4. Ion microprobe U-Pb measurements on a fossil tooth gave the values in the table below (Sano
and Terada, 1999). What is the age of this tooth?
Table 1. U-Pb measurements on a fossil tooth.
Sample I.D.
1234
238U/204Pb
206Pb/204Pb
36.7
8.82
26.4
5.95
57.8
13.99
78.8
17.30
Transcribed Image Text:4. Ion microprobe U-Pb measurements on a fossil tooth gave the values in the table below (Sano and Terada, 1999). What is the age of this tooth? Table 1. U-Pb measurements on a fossil tooth. Sample I.D. 1234 238U/204Pb 206Pb/204Pb 36.7 8.82 26.4 5.95 57.8 13.99 78.8 17.30
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