Scientists want to use Canadian lake mud as signifier for a new epoch in geological time
featured in textbooks and on school classroom walls, detailing the 4.6-billion-year history of Earth.We currently live in the Holocene Epoch, which covers the time from the end of the last ice age, 11,700 years ago.It's been the job of the AWG for the past decade to try to establish whether or not the chart should be updated.. A formal start date has also been identified - the 1950s.
"We see these spheroidal carbonaceous particles - 'fly ash' - that are produced by the very high temperature combustion of fossil fuels, primarily coal," said Prof Francine McCarthy from Brock University in St Catharines, Ontario. "We see plutonium in sediments and other materials from about 1945 onwards, relating to the atomic weapons testing programme. But really the point at which plutonium deposition went global was following high-yield thermonuclear bomb tests, starting in 1952," said Prof Andrew Cundy.
It's an extraordinary idea that geologists many millennia from now could be studying today's sediments to understand the profound changes earlier humans had imposed on Planet Earth.The proposed change to the Chronostratigraphic Chart: Epochs are sub-divided into Ages, or Stages.
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