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Which of the following is a radioisotope used to date rock formations older than 50,000 years? a. Carbon-14. b. Uranium-235. c. Cobalt-69. d. Carbon-12.
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Which of the following is a radioisotope used to date rock formations older than 50,000 years?

a. Carbon-14.
b. Uranium-235.
c. Cobalt-69.
d. Carbon-12.

User Sacrilege
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1 Answer

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You use uranium, carbon 14 half life is such that after 50000 years there won't be much left in the sample.
User Filnor
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