Humans have etched their impact on the Earth with such strength and permanence since the middle of the 20th century that a special team of scientists says a new geologic epoch began then.
People look out at the water at Crawford Lake in Milton, Ontario, on Friday, July 7, 2023. A team of scientists is recommending the start of a new geological epoch defined by how humans have impacted the Earth should be marked at the pristine Crawford Lake outside Toronto in Canada.
“It’s quite clear that the scale of change has intensified unbelievably and that has to be human impact,” said University of Leicester geologist Colin Waters, who chaired the Anthropocene Working Group. Crawford Lake, which is 79 feet deep and 25,800 square feet wide, was chosen over 11 other sites because the annual effects of human activity on the earth’s soil, atmosphere and biology are so clearly preserved in its layers of sediment. That includes everything from nuclear fallout to species-threatening pollution to steadily rising temperatures.
They are also proposing that it starts a new age, called Crawfordian after the lake chosen as its starting point.
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