which-evidence-supports-the-impact-hypothesis-for-the-cretaceous-extinction-even

Question

Which evidence supports the impact hypothesis for the Cretaceous extinction event?

Accepted Answer

The presence of iridium layers in geological strata worldwide.

Answer

The complete absence of fossils from the Cretaceous period.

Answer

The sudden increase of oxygen levels in the atmosphere.

Answer

The discovery of widespread volcanic rocks in Europe.