Why have some scientists proposed an Anthropocene Epoch after the Holocene?

Some scientists have proposed the Anthropocene Epoch as a new geologic interval to follow the Holocene Epoch because human activity has reached a level of global influence that fundamentally alters Earth’s systems.12

While the Holocene is characterized by the rise of human civilization, proponents of the Anthropocene argue that a distinction is necessary to separate this earlier period from the modern era, in which humans have achieved domination over the planet’s biogeochemical cycles, atmosphere, and oceans.12

Key reasons for this proposal include:
* Geologic Signatures: Supporters argue that human-driven changes—such as intensive agriculture, climate change, and ocean acidification—will leave unique, identifiable marks in the rock strata.3
* Mass Extinction: The current rate of species extinction is significantly higher than in preindustrial times, creating a distinct fossil record.3
* The Great Acceleration: Many scientists point to the mid-20th century as a turning point, marked by a surge in population, resource use, and the appearance of human-generated radioactive particles from nuclear weapons testing in the geologic record.5