Geologists Reject Declaration of ‘Human Era’ in Earth’s Timeline

upstart writes:

Scientists argued that mankind had been reshaping the planet long before the 1950s:

A top panel of geologists has decided not to grant Anthropocene, or 'human age', its own distinct place in Earth's geological timeline after disagreeing over when exactly the era might have begun.

After 15 years of deliberation, a team of scientists made the case that humankind has so fundamentally altered the natural world that a new phase of Earth's existence - a new epoch - has already begun.

Soaring greenhouse gases, the spread of microplastics, decimation of other species, and fallout from nuclear tests - all were submitted as evidence that the world entered the Anthropocene in the mid-20th century.

But the proposal was rejected in a contentious vote that has been upheld by the International Union of Geological Sciences, the field's governing body said in a statement published on its website on March 21.

[...] Despite this, the Anthropocene would endure as a widely used term: "It will remain an invaluable descriptor of human impact on the Earth system," the union said.

In 2009 scientists began an enquiry that ultimately concluded that the Holocene epoch - which began 11,700 years ago as the last ice age ended - gave way to the Anthropocene around 1950.

They gathered a trove of evidence to show this, including traces of radioactive material found in the layered sediment of lakes, the global upheaval of plants and animals, and omnipresent "forever chemicals".

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