3 ms·
Just to chip in, that life on Earth produced oxygen from photosynthesis, which over billions of years oxidised the iron in the ocean producing the iron ore beds
by zeristor 4y ago
Just to chip in, that life on Earth produced oxygen from photosynthesis, which over billions of years oxidised the iron in the ocean producing the iron ore beds as it precipitated out.
This occurred in stages.
- pencilguin 4y agoTo work, it needed stirring from plate tectonics.