We as a species have fundamentally changed the distribution of substances in nature at a global level so many times. The biggest one is nuclear dating. You can very very specifically date anything that happened after the first nuclear bomb tests, anywhere in the world, because the materials will have radio nucleotides that just straight up did not exist in nature before the bombs
I've read about that too. I don't possess the formal education level for the fine details but can easily grasp the overall concept and cause/effect.
This kind of shit gives me a moral conundrum sometimes. Not just the nuclear thing but the overall extent of alterations we make to the environment that can last centuries or even forever beyond what is in the grand scheme of things our little flash in the pan of an existence.