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World's oldest glacier dates to 2.9 billion years ago, research finds

Ancient glacier sediment may be 2.9 billion years old. ....

Kwazulu Natal , South Africa , United States , Andrey Bekker , Ilya Bindeman , Kaapvaal Craton , Axel Hofmann , University Of Oregon , Department Of Geology At University Johannesburg , University Of California , Pongola Supergroup ,

Scientists find evidence of world's oldest glaciers

Scientists find evidence of world's oldest glaciers
phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.

United States , South Africa , Ilya Bindeman , Axel Hofmann , Professor Axel Hofmann University Of Johannesburg , Department Of Earth Planetary Sciences , Professor Ilya Bindeman University Of Oregon , University Of California , Geochemical Perspectives , Professor Axel Hofmann , Professor Ilya Bindeman , Andrey Bekker , Associate Professor , Planetary Sciences , Geochemical Perspectives Letters ,

Scientists Discover Ancient Traces of The Oldest Glaciers Ever Found

Scientists think they've uncovered evidence of the oldest glaciers ever found, in ancient rocks speckled with oxygen isotopes lying beneath the world's largest gold deposits in South Africa. ....

South Africa , Kwazulu Natal , United States , Western Cape , Andrey Bekker , Ilya Bindeman , Bindeman Hofmann , Axel Hofmann , University Of Johannesburg , European Association Of Geochemistry , Geochemical Society Goldschmidt Conference , University Of California , University Of Oregon , Pongola Supergroup , Klipwal Mine , Geochemical Perspectives Letters , Snowball Earth , European Association , Geochemical Society ,

Earth Nearly Lost All Oxygen And Could Have Suffocated 2.3 Billion Years Ago

STEPHANIE PAPPAS, LIVE SCIENCE
9 APRIL 2021
Earth s transition to permanently hosting an oxygenated atmosphere was a halting process that took 100 million years longer than previously believed, according to a new study.
When Earth first formed 4.5 billion years ago, the atmosphere contained almost no oxygen. But 2.43 billion years ago, something happened: Oxygen levels started rising, then falling, accompanied by massive changes in climate, including several glaciations that may have covered the entire globe in ice.

Chemical signatures locked in rocks that formed during this era had suggested that by 2.32 billion years ago, oxygen was a permanent feature of the planet s atmosphere.
But a new study delving into the period after 2.32 billion years ago finds that oxygen levels were still yo-yoing back and forth until 2.22 billion years ago, when the planet finally reached a permanent tipping point. ....

South Africa , United States , Andrey Bekker , University Of California , Great Oxidation Event , North America , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் கலிஃபோர்னியா , நன்று ஆக்ஸைடேஶந் நிகழ்வு , வடக்கு அமெரிக்கா ,

Study Finds Drastic Fluctuations in Atmospheric Oxygen After its Early Appearance

Study Finds Drastic Fluctuations in Atmospheric Oxygen After its Early Appearance
Written by AZoCleantechApr 6 2021
A new study reveals that the permanent increase in oxygen in the Earth’s atmosphere, which enabled the emergence of life as it is known, occurred 100 million years later than considered earlier.
Biogeochemist Simon Poulton, left, sprays water on drill core to see sedimentary rocks and select samples for research. Image Credit: Andrey Bekker/UCR.
A major increase in oxygen happened nearly 2.43 billion years ago, which marked the beginning of the Great Oxidation Episode a crucial moment in Earth’s history.
An international team of scientists, including a researcher from UC Riverside, investigated rocks from South Africa formed at the time of this event. ....

South Africa , Biogeochemist Simon Poulton , Andrey Bekker , Simon Poulton , Leeds University , Great Oxidation Episode , Paleoproterozoc Era , சிமோன் பௌல்டந் , லீட்ஸ் பல்கலைக்கழகம் , நன்று ஆக்ஸைடேஶந் அத்தியாயம் ,