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☆ Are we in the Anthropocene Epoch? Not so fast, geologists say
▼ + stars: | 2024-03-05 | by ( Katie Hunt | ) edition.cnn.com time to read: +4 min

CNN —Scientists have voted against a proposal to declare a new geological epoch called the Anthropocene to reflect how profoundly human activity has altered the planet. The vote followed a 15-year process to select a geological site that best captures humanity’s impact on the planet. Some experts argued that the start of the Anthropocene could be better defined in other ways, such as the beginning of the Industrial Revolution. “This is the commission’s expert group for this interval of geological time and we are bound by its decision. Regardless of whether the term is officially classified as a geological epoch, Anthropocene is already widely in use, Cohen noted.

Persons: Kim Cohen, ”, Cohen, Phil Gibbard, eon, Colin Waters, Waters, …, David Harper, ” Harper, hadn’t, “ Organizations: CNN —, International Union of Geological Sciences, CNN Tuesday, geosciences, Utrecht University, Scott Polar Research, University of Cambridge, Geologists, University of Leicester, Durham University, International, of Locations: Ontario, Netherlands, United Kingdom

☆ A Canadian lake best charts humanity’s impact on Earth
▼ + stars: | 2023-07-15 | by ( Katie Hunt | ) edition.cnn.com time to read: +6 min

Fossils embedded in rock reveal intriguing details about animals, plants and other life-forms that once called Earth home. ConsequencesCrawford Lake in Ontario is the geological site that best reflects a new epoch recognizing the impact of human activity on Earth, said geologists of the Anthropocene Working Group. The Anthropocene Working Group determined in 2016 that the epoch began around 1950 — the start of the era of nuclear testing. The international research group says that Crawford Lake in Ontario best charts humanity’s impact on Earth. Back then, it took 10 hours to relay a single image to Earth — incredibly slow by today’s standards.

Persons: Crawford, they’ve, Amenhotep III, didn’t, Philippe Martinez, Mona Lisa of Egypt, Thais Rabito Pansani, —, Webb, Ashley Strickland, Katie Hunt Organizations: CNN, Conservation, Scientists, MAFTO, Sorbonne University, NASA Mariner, Mariner, NASA Jet Propulsion, CNN Space, Science Locations: Ontario, Brazil, South America, Americas

☆ Anthropocene: Scientists say they’ve found a site that marks a new chapter in Earth’s history
▼ + stars: | 2023-07-11 | by ( Katie Hunt | ) edition.cnn.com time to read: +11 min

CNN —Scientists have identified the geological site that they say best reflects a proposed new epoch called the Anthropocene — a major step toward changing the official timeline of Earth’s history. “We’ve moved into this new Earth state and that should be defined by a new geological epoch,” Waters added. On Tuesday, the scientists announced the geological site — Crawford Lake in Ontario, Canada — that best captures the geological impact of the Anthropocene, according to their research. Annual sediment samples from the Crawford Lake site have revealed geochemical traces of nuclear bomb testing, researchers have confirmed. The alpha spectrometry output shown on the screen indicates the presence of plutonium in a Crawford Lake drill core sample.

Persons: ”, Colin Waters, “ We’ve, Waters, eon, James St, Andrew Knoll, “, ” Knoll, Crawford, AWG, Crawford Lake, Francine McCarthy, Andrew Cundy, Stan Finney, it’s, Paul Crutzen —, Finney, It’s, stratigraphers, ” Waters, they’re, Andrew Mathews, We’ve, ’ ” Organizations: CNN —, Environment School, University of Leicester, Geologists, Wales, Harvard University, University, Southampton, Brock University, UK’s University of Southampton, International, International Union of Geological Sciences, Geological Congress, California State University, University of Southampton “, University of California Locations: Crawford Lake, Ontario, Canada, Flinders, South Australia, Jura, Crawford, Southampton Crawford, Sudeten, Lake, California, Baltic, Japan, China, Australia, Gulf of Mexico, Busan, South Korea, Long, Santa Cruz

☆ Canadian lake sediments reveal start of Earth's Anthropocene age, scientists say
▼ + stars: | 2023-07-11 | by ( David Stanway | ) www.reuters.com time to read: +5 min

Presence of plutonium and other evidence was found in core samples of the Crawford Lake sediments. The Anthropocene epoch is proposed as a chapter in Earth's history reflecting the transformation of the planet's climate and ecology as a result of human activity. The Anthropocene epoch has not yet been formally recognised by a scientific body called the International Commission on Stratigraphy. The scientists obtained core samples of sediment at Crawford Lake and sediments, soils, corals and ice samples at the other 11 sites. Crawford Lake sediments provided a record of accelerating changes that have unfolded in the past few decades, including traces of fly ash produced by burning fossil fuels.

Persons: Crawford, Colin Waters, we've, Waters, Francine McCarthy, Andrew Cundy, Bill Laurance, David Stanway, Will Dunham Organizations: University of Leicester, International, Crawford Lake, Brock University, Industrial, University of Southampton, James Cook University, Thomson Locations: Crawford, Canada's Ontario, Toronto, Britain, Canada, Australia, Singapore

☆ The Human Age Has a New Symbol. It’s a Record of Bomb Tests and Fossil Fuels.
▼ + stars: | 2023-07-11 | by ( Raymond Zhong | More About Raymond Zhong | ) www.nytimes.com time to read: +1 min

For almost 15 years, a panel of scholars has been chewing over a big question: Has our species transformed the planet so much that we have plunged it into a new interval of geologic time? On Tuesday, the panel announced a key part of its case for declaring that we had. The group said it had chosen a secluded lake in Ontario to represent the start of Anthropocene epoch, a potential new chapter in Earth’s 4.6-billion-year history that could soon sit alongside the Cambrian, the Jurassic and the Cretaceous in marking periods of momentous planetary change. The scientists picked Crawford Lake over 11 other candidate sites because it contained the clearest and most pronounced evidence of humankind’s influence on the global geologic record, representatives for the group said at a news briefing in Lille, France. This evidence includes sharp changes in plutonium and radiocarbon from nuclear detonations, and in fly ash from accelerated burning of fossil fuels.

Persons: Crawford Organizations: Crawford Lake Locations: Ontario, Earth’s, Lille, France

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