Biology, 10.12.2021 04:10 Gabejenedu

1. From which period is a rock at +2.7 m depth? A. Paleogene
B. Cretaceous

2. What is the average iridium content of rock 0.5 m below the K–Pg boundary layer?

A. 0.25 ppb
B. 0.30 ppb
C. 0.36 ppb
D. 41.6 ppb

3. How much more iridium was found in the K–Pg boundary layer than in rock 0.5 m below it?

A. 41.35 ppb
B. 41.60 ppb
C. 41.24 ppb
D. 39.62 ppb

Answers: 2

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1. From which period is a rock at +2.7 m depth? A. Paleogene
B. Cretaceous

2. Wh...