the earliest fossils of animals the earliest sediments of oxidized rock impact craters of oxidized-iron asteroids extensive volcanic calderas of similar age
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which provides the oldest evidence for oxygen accumulation in Earth's atmosphere?
Possibilities:
- the earliest fossils of animals
- the earliest sediments of oxidized rock
- impact craters of oxidized-iron asteroids
- extensive volcanic calderas of similar age

the earliest sediments of oxidized rock