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Megafloods: What they leave behind
ScienceDaily
South-central Idaho and the surface of Mars have an interesting geological feature in common: amphitheater-headed canyons. These U-shaped canyons with tall vertical headwalls are found near the Snake River in Idaho as well as on the surface of Mars, according to photographs taken by satellites. Various explanations for how these canyons formed have been offered — some for Mars, some for Idaho, some for both — but in a paper published the week of December 16 in the online issue of Proceedings of the National Academy of Sciences, Caltech professor of geology Michael P. Lamb, Benjamin Mackey, formerly a postdoctoral fellow at Caltech, and W. M. Keck Foundation Professor of Geochemistry Kenneth A. Farley offer a plausible account that all these canyons were created by enormous floods.
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SOCIETY NEWS


Goldschmidt2014: Mentor Program
GS
We are happy to offer the very first Goldschmidt mentoring program in Sacramento. Designed for novice conference attendees, students, and early career scientists, mentees will be matched one-on-one with an experienced scientist to help them navigate the conference. You may indicate your interest in being a mentor or a mentee when you register for the meeting. To be included in the program you should register by April 8 to allow time for matching and communication.
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PRODUCT SHOWCASE
  Analab corrosion resistant laboratory appliances

Analab manufacture corrosion resistant laboratory appliances such hotplates, acid vapour cleaning stations and sample preparation devices. Our devices can be used with a wide range of acids and bases (HF to NH4OH). We are represented in North America by Isomass Scientific.

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Geochemical Career Center
GS


Post Doc position for laser ablation geochronologist or thermochronologist (University of Calgary, Calgary, AB, Canada)



Director, Romberg Tiburon Center for Environmental Studies (San Francisco State University, San Francisco, CA, USA)



Professor of Geochemistry and Economic Geology (Karlsruhe Institute of Technology, Karlsruhe, Germany)



Graduate student opportunities in environmental, analytical and exploration geochemistry (MAGNET, various locations, Canada)



Scripps Institution of Oceanography Postdoctoral Position (Scripps Institution of Oceanography, La Jolla, CA, USA)



International research chair in stable isotope biogeochemistry / paleoceanography (LabexMER, Brest/Dinard, France)



Final Days! Post-doc in Geochemistry at GEUS (Geological Survey of Denmark and Greenland, Copenhagen, Denmark)



Final Days! Post-docs and Graduate Students Opportunities at ASU, MIT, UC Riverside, U Maryland and U Washington (Multi-Institutional, USA)

Job Seekers: View current openings | Post your resume | Career resources

Employers: All jobs posted in the Geochemical Career Center are cross-promoted through Facebook, Twitter and right here in Geochemical News.

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New in GCA (v.124, 1 January 2014)
GS
Stable isotope time-series in mammalian teeth: In situ δ18O from the innermost enamel layer

Straight line regression through data with correlated uncertainties in two or more dimensions, with an application to kinetic isotope fractionation

Lithospheric and asthenospheric sources of lamprophyres in the Jiaodong Peninsula: A consequence of rapid lithospheric thinning beneath the North China Craton?

Coupled effects of temperature and mass transport on the isotope fractionation of zinc during electroplating

Tracing river chemistry in space and time: Dissolved inorganic constituents of the Fraser River, Canada

Morphology and crystal structures of solar and presolar Al2O3 in unequilibrated ordinary chondrites

CO2 solubility and speciation in rhyolitic sediment partial melts at 1.5–3.0 GPa – Implications for carbon flux in subduction zones

Viscous flow behavior of tholeiitic and alkaline Fe-rich martian basalts

A large column analog experiment of stable isotope variations during reactive transport: I. A comprehensive model of sulfur cycling and δ34S fractionation

A large column analog experiment of stable isotope variations during reactive transport: II. Carbon mass balance, microbial community structure and predation

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LATEST NEWS


2014 CIDER Summer Program
CIDER
The 2014 CIDER summer program will be held at the KITP in Santa Barbara (CA) from June 22- Aug. 1, on the theme: "Dynamics of Planetary Interiors". Weeks 1-2 (June 22-July 5) of this six week program will provide the opportunity for groups of scientists to interact freely. Weeks 3-6 (July 6 to Aug 1) is a tutorial and workshop program for advanced graduate students and post-docs. Senior scientists are welcome at any point in the program, but priority will be given to those that stay for at least two weeks. Travel and on-site support available. Application deadline is Feb. 1. Please visit the CIDER page for more information. The CIDER program is sponsored by the NSF/FESD program.
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International GeoBiology Course
USC
GeoBiology 2014: An International Training course in a Rapidly Evolving Field will be held at the Wrigley Institute for Environmental Studies at the University of Southern California from June 8 – July 10. The course is approximately 5 weeks long and will begin in Los Angeles, with a field trip north to several geobiologically relevant sites in the Mono Lake, Calif., area, followed by laboratory time at Cal State Fullerton and the USC Wrigley Institute for Environmental Studies on Catalina Island, Calif. The application deadline for the course is Feb. 15.
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Deep Carbon Observatory Summer School
Deep Carbon Observatory
The first Deep Carbon Observatory (DCO) Summer School will be held July 13-18 at Big Sky Resort in Montana with fieldwork in Yellowstone National Park in Wyoming. The purpose of the Summer School is to introduce 30 students, postdocs and/or early-career researchers interested in deep carbon science to the interdisciplinary concepts, which are the cornerstone of DCO's approach to understanding Earth. The application deadline is Feb. 1.
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Iso-Camp Summer Program
Iso-Camp
Iso-Camp is a multi-instructor short course offered to graduate students and postdoctoral investigators interested in learning more about the application of stable isotopes to environmental and ecological studies. The course will be held June 9-20, at the University of Utah and will welcome 40 students from all over the world. The application deadline is Feb. 7.
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Arctic sea ice gaps drive toxic mercury conveyor belt
Los Angeles Times
Gaps forming in seasonal Arctic sea ice may be creating a toxic conveyor belt, drawing mercury from higher altitudes to rain down on the ice, snow and tundra, according to a new study. The gaps, which come as the region shifts from perennial ice to thinner seasonal ice due to climate change, drive convection currents in the lower atmosphere that cycle mercury and ozone from higher levels toward Earth's surface, where oxidation converts the mercury into a more toxic form, according to the study published in the journal Nature.
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Early start for plate tectonics
Chemistry World
Subduction of the Earth's crust – and modern-day plate tectonics – may have begun as early as the Hadean Eon, 4.4 billion years ago, according to a new study led by researchers from Australia. Using geochemical stratigraphy, the researchers found similarities between modern-day subduction zones near Japan and early-Earth deposits from Canada.
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Large landmasses existed 2.7 billion years ago
ScienceDaily
Some 71 percent of Earth's surface is covered by oceans and 29 percent by land. The question of when large landmasses emerged from the oceans has always been hotly debated by scientists. New investigations by geoscientists of the University of Cologne in cooperation with the University of Bonn and the Jacobs University Bremen have shown that large land masses did indeed exist on Earth 2.7 billion years ago.
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UCR researchers: World's oldeset diamonds are fake
Highlander
Nearly half a decade ago, geologists believed that they had discovered petite gems inside zircon crystals from Western Australia's Jack Hills, which were considered to be the world's oldest diamonds. The minerals were considered to be 4.3 billion years old, suggesting that the primordial earth cooled at a much earlier rate, in order to create a thick, continental crust under which diamonds could be formed.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    Acid mine drainage reduces radioactivity in fracking waste (ScienceDaily)
Geologists find diamond-producing rocks in Antarctica (io9)
Sea floor map result stuns experts (The New Zealand Herald)

Don't be left behind. Click here to see what else you missed.


 

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