'The presence of plutonium gives us a stark indicator of when humanity became such a dominant force that it could leave a unique global 'fingerprint' on our planet.'
To address these questions, the International Commission on Stratigraphy created the Anthropocene Working Group. They have chosen Crawford Lake in Canada as the Global Boundary Stratotype Section and Point for the Anthropocene.
"It is this ability to precisely record and store this information as a geological archive that can be matched to historical global environmental changes which make sites such as Crawford Lake so important," he said. "The presence of plutonium gives us a stark indicator of when humanity became such a dominant force that it could leave a unique global 'fingerprint' on our planet," said Professor Andrew Cundy, chair of Environmental Radiochemistry at the University of Southampton and member of the Anthropocene Working Group.
Other geological signs of human activity include increased ash from coal power plants, higher amounts of heavy metals like lead, and the presence of plastic fibers and fragments.
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