cammmi7050 cammmi7050
  • 20-03-2024
  • Chemistry
contestada

Iridium is rare on Earth, and comes from space. Finding an iridium level of ______ ppb across the Gubbio formation showed a massive spike in the K-T boundary clay. What is the iridium level?
1) 3000
2) 30
3) 3
4) 300

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