Question:

What evidence is there that shows there was a large amount

Last updated: 3/14/2023

What evidence is there that shows there was a large amount

What evidence is there that shows there was a large amount of O2 released to Earth s early atmosphere around 2 7 billion years ago Rust first appears around this time Stromatolites containing cyanobacteria can be dated to this time The ratios of sulfur on Earth changed around this time All of the above