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Metagenomes of Mediterranean coastal lagoons
Nature    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Coastal lagoons, both hypersaline and freshwater, are common, but still understudied ecosystems. We describe, for the first time, using high throughput sequencing, the extant microbiota of two large and representative Mediterranean coastal lagoons, the hypersaline Mar Menor, and the freshwater Albufera de Valencia, both located on the south eastern coast of Spain. More

 Society News

New in GCA (v. 90, August, 2012)
GS    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Real-time monitoring of the overall exchange of oxygen isotopes between aqueous CO3 and H2O by Raman spectroscopy

Controls on PGE fractionation in the Emeishan picrites and basalts: Constraints from integrated lithophile–siderophile elements and Sr–Nd isotopes

Unusual fractionation of both odd and even mercury isotopes in precipitation from Peterborough, ON, Canada

Evaluating the role of sulfide-weathering in the formation of sulfates or carbonates on Mars

The influence of authigenic clay formation on the mineralogy and stable isotopic record of lacustrine carbonates

Energetic and structural studies of amorphous Ca1−xMgxCO3•nH2O (0 ≤ x ≤1)

Thermodynamic limitations on microbially catalyzed reaction rates

Improvement of the determination of element concentrations in quartz-hosted fluid inclusions by LA-ICP-MS and Pitzer thermodynamic modeling of ice melting temperature

What can paired measurements of Th isotope activity and particle concentration tell us about particle cycling in the ocean?

 Latest News

Can small volcanic eruptions affect global climate?
Christian Science Monitor    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Even small volcanic eruptions could have a big impact on global climate, new research suggests. A relatively small eruption in the summer of 2011 produced gases such as sulfur dioxide that reached high in the atmosphere and spread throughout the Northern Hemisphere, combining with water vapor and forming particles that reflect light and prevent it from reaching Earth, thus potentially resulting in a cooling effect, according to a study detailed in the July 6 issue of the journal Science. More

Miners are unlocking China's gold: Noel White
Business Insider    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Technology is producing major breakthroughs in geochemistry. Geochemistry started off just collecting samples of soil or stream sediments and using simple analytical techniques. More and more sensitive analytical methods have been developed. Partial leach techniques extract part of the geochemical sample to maximize the sensitivity. More

Rise of the feathered dinosaurs
Nature    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Feathers didn't start with birds. Plumage of various sorts — from simple fuzz to the complex structures used for flight — adorned dinosaurs first, and was only later inherited by birds. And if a beautifully preserved juvenile dinosaur unearthed in the Jurassic strata of Germany is any indication, it is possible that all dinosaurs bore patches of filamentous feathers. More

Spacecraft raises Mercury mysteries
Discovery News    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Mercury has an unexpectedly rich volcanic history where thick lava flooded much of the surface. Unlike the moon, Mercury has extensive lowlands varying by only a few miles in elevation above the mean surface. The planet does have so-called mass concentrations, or "mascons," that are the buried cadavers of asteroids that plowed into Mercury. These were first discovered on the moon in the 1960s, located beneath the great mare basins. More

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