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  • 20-02-2024
  • Biology
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Find the age of intrusion. It was assayed and found to contain the same type of isotopes known from the basalts, but the mix was 25% parent and 75% daughter isotope.
a) 4.7 billion years
b) 2.8 billion years
c) 1.2 billion years
d) 3.6 billion years

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