What evidence found in the sediment of Crawford Lake in Ontario (Canada) supports the proposal for the start date of the Anthropocene epoch?

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Scientists presented evidence from Lake Crawford in Ontario, Canada, to support the notion that human activity has ushered in a new geologic epoch called the Anthropocene. The lake's sediment layers revealed a 'golden spike,' indicating a significant and sudden change in Earth's conditions. Plutonium found in the sediment, likely from nuclear testing in the 1950s, served as a clear marker for the Anthropocene. The proposed start date for this epoch is between 1950 and 1954. While the concept of the Anthropocene is still debated, the evidence will be submitted to the International Commission on Stratigraphy for consideration. The recognition of the Anthropocene would signify the end of the Holocene, which spanned the past 11,700 years. The impact of human behavior on the Earth's environment has surpassed our understanding of the consequences, according to experts.

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