We've left our mark - New Anthropocene epoch

_Tombstone_

Scientists find a layer of plastics, radiation and soot embedded in the planet's surface, defining a new Anthropocene epoch

Evidence for a new geologic epoch continues to accumulate, like layers of sediment that over time harden into strata. Although those who study the branch of geology known as stratigraphy—the study of those strata and their resolution into Earth's vast geologic time scale—will continue to debate the idea of the Anthropocene for what may seem like eons, the record in the rock continues to pile up.

Manach

The book, 6th extinction would also be a good resource that delves into the effects humankind have had on the geological record.

Wibbs

Yep, local extinctions, particularly of large mammals is nigh on a sure sign modern humans moved into an new region. We don't see that we pre modern humans at all. They seemed to hit a predator/prey/population size equilibrium pretty rapidly and extinctions don't occur.