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Geochemistry: A rusty carbon sink
Nature (paid subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The finding that reactive iron species may have a role in stabilizing organic matter in ocean sediments underlines the tight coupling between the biogeochemical cycles of carbon and iron. More




 Society News


New geochemical career center posting
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Faculty position in geology, low temperature geochemistry
Utah State University — Department of Geology

Job seekers: It only takes a few minutes to create an account to apply for jobs. Sign up now for access to all the great features on Geochemical Career Center.
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 Latest News


Upcoming conferences
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April 22-25 – AAPG Annual Convention and Exhibition, Long Beach, Calif.

May 27-29 – GAC-MAC Annual Meeting, St. John's Newfoundland

June 9-23 – 6th Int. Siberian Early Career GeoScientists Conference, Novosibirsk, Russia

June 11-14 – Interfaces Against Pollution, Nancy, France

June 24-29 – Goldschmidt 2012, Montreal, Canada

View our full conferences calendar at http://www.geochemsoc.org/news/conferencelinks/index.htm
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Identifying ancient droughts in China
ScienceDaily    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Drought events are largely unknown in Earth's history, because reconstruction of ancient hydrological conditions remains difficult due to lack of proxy. New geology research supported by China's NNSF and MS&T uses a microbial lipid proxy of highly alkaline conditions to identify enhanced aridity in Miocene sediments on the Tibetan Plateau. This enhanced aridity is associated with significant uplift of the Tibetan Plateau nine million years ago. More

Cry me a river: Following a watershed's winding path to sustainability
National Science Foundation    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Cherokee Marsh, it's called, this sunken enclave surrounded by cattails and bulrushes. The marsh is a mere dot on a map of the state of Wisconsin, but its importance reaches far beyond the wetland's edge. The river and its watershed provide Madison with critical "ecosystem services" such as water quality and flood protection, says Chris Kucharik, a scientist at the University of Wisconsin-Madision. More

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Did cosmic impact kill the mammoths?
The Orange County Register    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A series of strikes by an asteroid or comet might solve a prehistoric mystery: Why did a long list of creatures, from mammoths and saber-toothed cats to horses and camels, vanish suddenly from North America nearly 13,000 years ago? Relying on a meticulous analysis of fragments, including tiny diamonds of submicroscopic size, from a dark layer of sediment in a Mexican lake, a new study suggests that large objects from space might have caused the continental-sized catastrophe. More

Meteorites reveal another way to make life's components
NASA    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Creating some of life's building blocks in space may be a bit like making a sandwich — you can make them cold or hot, according to new NASA research. This evidence that there is more than one way to make crucial components of life increases the likelihood that life emerged elsewhere in the universe, according to the research team, and gives support to the theory that a "kit" of ready-made parts created in space and delivered to Earth by impacts from meteorites and comets assisted the origin of life. More

A mystery still: Why early Earth didn't freeze over
LiveScience via MSNBC    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Global warming gases cannot explain why Earth was not frozen billions of years ago when the sun was cooler, researchers say. In the Archean Eon about 2.5 billion to 4 billion years ago, before the first advanced life appeared on the planet, the sun was only about 70 percent as bright as it is today. This means the amount of heat felt on Earth was much less, and Earth's surface should have been frozen. More

Costa Rica: Hotspot with hydrothermal vents, methane seeps found
Global Adventures    Share    Share on FacebookTwitterShare on LinkedinE-mail article
There are few places on earth were hydrothermal vents and cold areas emitting methane coexist. One such area can be found off the coast of Costa Rica. Here, geothermally heated water rises through fissures from the earth crust and methane bubbles from 'seeps' on the ocean floor. Scientists discovered this unusual hotspot during a 2010 expedition that also revealed a large number of mysterious, previously undescribed species. More


 
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