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Latest Anoxic event Stories

Mass Extinction During The Pangea Integration
2013-11-04 03:21:57

redOrbit Staff & Wire Reports - Your Universe Online The integration of Pangea that began during the early Permian period may have caused the environment to deteriorate, playing a role in the mass extinction event that occurred 250 million years ago, according to research appearing in the most recent edition of the journal Science China Earth Sciences. In the study, co-authors, professor Yin Hongfu and Dr. Song Haijun of the State Key Laboratory of Geobiology and Environmental...

Toxic Ocean Conditions During Ancient Extinction Event Analyzed
2013-10-30 04:24:55

redOrbit Staff & Wire Reports - Your Universe Online Toxic oxygen-free and hydrogen sulfide-rich ocean conditions that existed during a major extinction event nearly 94 million years ago could repeat themselves in the future, according to new research being published online this week in the journal Proceedings of the National Academy of Sciences. Research, led by biogeochemists at the University of California, Riverside, suggests that the previous estimates of these oxygen-free,...

Image 1 - New Technique Unlocks Secrets Of Ancient Ocean
2011-10-11 11:53:04

ASU researchers develop new method to learn about Earth's largest mass extinction event Earth's largest mass extinction event, the end-Permian mass extinction, occurred some 252 million years ago. An estimated 90 percent of Earth's marine life was eradicated. To better understand the cause of this "mother of all mass extinctions," researchers from Arizona State University and the University of Cincinnati used a new geochemical technique. The team measured uranium isotopes in ancient...

2010-03-22 16:45:56

The Early Aptian (120 million years ago) was an age of intense volcanic activity on Earth, eruptions that emitted large amounts of CO2 into the atmosphere, thus causing a revolution in the carbon cycle. As a consequence, great changes happened in the whole of the terrestrial system. Researcher María Isabel Millán has studied how these changes happened in the marine environment of the Aralar mountain range (at that time it was under the sea) in the Basque Country, and...

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2010-02-16 16:39:50

Two studies provide clearer picture of how carbon cycle was dramatically affected long ago Geoengineering -- deliberate manipulation of the Earth's climate to slow or reverse global warming -- has gained a foothold in the climate change discussion. But before effective action can be taken, the Earth's natural biogeochemical cycles must be better understood. Two Northwestern University studies, both published online recently by Nature Geoscience, contribute new -- and related -- clues as to...

2009-09-02 08:10:00

GEOLOGY includes studies of the Fraser River delta, British Columbia; the impact of global climate change on microfossil communities; alluvial fans in Taiwan; earthquake ruptures; earth-flows along the Eel River; Mediterranean fossil whales; collecting bias and carnivorous dinosaurs of the Kem Kem Formation, Morocco; and the effects Hurricanes Cindy, Katrina, and Rita on barrier island systems. GSA TODAY tells a 20-million-year-old story of interactions among the Columbia River, volcanic...

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2008-07-17 07:40:00

More than 93 million years ago, researchers say undersea volcanic activity caused mass extinction in the worlds' oceans. During the late Cretaceous Period, the supposed "anoxic event" starved oxygen from the ocean depths and wiped out millions of marine organisms. Researchers from the University of Alberta, Canada, published their findings in the journal Nature. They found a telltale signature of underwater volcanism in rocks dating to the period. Researchers say during the undersea...

2005-09-07 16:00:00

An oxygen-free ocean from bottom to surface is probably the worst scenario that marine higher life can experience. Are processes and feedbacks linking the atmosphere to the deep ocean capable to cause a rapid change from an oxygen-rich to an oxygen-free deep ocean? And what are the consequences for the global carbon cycle that ultimately drive marine and terrestrial ecosystems and climate variation? These are fundamental and burning questions on the society's agenda. Hurricane Katrina and...


Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.