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Prehistoric Atlantic Ocean was twice as salty as today
Discover
It's been 35 million years since a large meteorite slammed into the Earth, cracking bedrock beneath what is now the Chesapeake Bay. The impact left pores that collected groundwater from beneath it. Now researchers have dated that water to between 100 million and 145 million years old, and report that it's twice the salinity of modern sea water.
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SOCIETY NEWS


Input needed: Goldschmidt2014 Field Trips
GS
A preliminary list of thirteen pre- and post-meeting field trips for the California Goldschmidt Conference has been announced. About half of these will be run next year, and the final list will be on the basis of the number of people expressing interested in each trip by Dec. 1. To learn more about the trips and to submit your interest, please see http://goldschmidt.info/2014/fieldTrips.

Here is the list of the proposed post-conference trips. The pre-conference trips are also available on the Goldschmidt website, and were announced in last week's Geochemical News.
  • The Geology of Lassen Volcanic National Park
  • Long Valley Caldera and Mono Basin
  • Plutonic Rocks in Yosemite
  • Arsenic contamination and mitigation at Empire Mine State Historic Park, and North Star Mining Museum, Grass Valley, CA
  • Crystallized Climate in Central Sierra Nevada Foothill Caves
  • The Monterey Formation in the Monterey – Carmel Valley Area, California

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Executive Editor for Elements Magazine
GS
We seek an outstanding and creative individual to lead Elements magazine into its second decade, as the current Executive Editor will retire at the end of 2014. Elements, published six times yearly, is a joint publication of 17 international societies covering the fields of mineralogy, petrology, and geochemistry (MPG). Each issue comprises a thematic content of six peer-reviewed articles geared to the technical MPG nonspecialist, as well as nonthematic content.

For details on the job description and qualifications, please visit the Geochemical Career Center posting. Applications should include a cover letter clearly addressing the required qualifications, a CV, and the names of three referees. Applications and/or questions should be sent electronically to: Dr. Barb Dutrow, Chair, Elements Search Committee. Applications will be reviewed starting Nov. 30, 2013, and the position will remain open until filled.

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Geochemical Career Center
GS


New! Open Faculty Position in Experimental Earth Science (Columbia University, Palisades, NY, USA)



Assistant/Associate Professor in Geochemistry (Laurentian University, Sudbury, ON, Canada)



Assistant or Associate Professor - Lithogeochemistry (Colorado School of Mines, Golden, CO, USA)



Manager of Stable Isotope Laboratory (University of Tennessee, Knoxville, TN, USA)




Roger E. Deane Postdoctoral Fellowship (University of Toronto, Toronto, ON, Canada)



Tenure Track Assistant Professor-Geochemistry (Stony Brook University, Stony Brook, NY, USA)



Faculty Member in Geobiology or Paleobiology (UCLA, Los Angeles, CA, USA)




Research Associate in Raman Spectroscopy (University of Colorado, Boulder, CO, USA)



Assistant Professor of Coastal Systems and Geochemistry (University of Massachusetts Boston, Boston, MA, USA)




Tenured Full Professor in Organic Geochemistry (University of Oldenburg, Oldenburg, Germany)



Carnegie Postdoctoral Fellowship Positions in Geochemistry, Cosmochemistry, and Astrobiology (Carnegie Institution of Washington, Washington, DC, USA)



Assistant Professor of Organic Geochemistry (The University of Tulsa, Tulsa, OK, 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.121, 15 November 2013)
GS
Investigating humic substances interactions with Th4+, UO2+2, and NpO+2 at high pH: Relevance to cementitious disposal of radioactive wastes

Ultra-high precision 40Ar/39Ar ages for Fish Canyon Tuff and Alder Creek Rhyolite sanidine: New dating standards required?

Stable carbon isotopes of C3 plant resins and ambers record changes in atmospheric oxygen since the Triassic

Thermodynamic properties of aqueous NaCl solutions to 1073 K and 4.5 GPa, and implications for dehydration reactions in subducting slabs

Chemical projectile–target interaction and liquid immiscibility in impact glass from the Wabar craters, Saudi Arabia

Dynamics of basaltic glass dissolution – Capturing microscopic effects in continuum scale models

Amino acid nitrogen isotopic composition patterns in lacustrine sedimenting matter

Multi-scale characterization of pore evolution in a combustion metamorphic complex, Hatrurim basin, Israel: Combining (ultra) small-angle neutron scattering and image analysis

Calcium-isotope fractionation between solution and solids with six, seven or eight oxygens bound to Ca(II)

Mg-isotopic fractionation in the manila clam (Ruditapes philippinarum): New insights into Mg incorporation pathway and calcification process of bivalves

Photochemical flocculation of terrestrial dissolved organic matter and iron

Assessment of seawater Nd isotope signatures extracted from foraminiferal shells and authigenic phases of Gulf of Guinea sediments

Element variations in rhyolitic magma resulting from gas transport

The oxygen isotope evolution of parent body aqueous solutions as recorded by multiple carbonate generations in the Lonewolf Nunataks 94101 CM2 carbonaceous chondrite

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Conference calendar December deadlines
GS
Abstract Deadlines
Dec. 3: AAG Annual Meeting (USA)

Registration Deadlines
Dec. 2: 94th Annual Meeting of the American Meteorlogical Society (USA)
Dec. 20: International Conference on Atmospheric Dust (Italy)

Conference organizers — be sure to add your conference to our conference calendar.

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LATEST NEWS


National Research Council Decadal Survey of Ocean Sciences (DSOS 2015)
National Research Council
The purpose of this decadal study, sponsored by the NSF, is to "develop a list of the top ocean science priorities for the next decade in the context of the current state of knowledge, ongoing research activities, and resource availability. The DSOS committee's report will present a compelling research strategy for increased understanding of the oceans over the decade 2015-2025."

The DSOS committee feels strongly that this report must be informed by broad and thoughtful community input from across the entire spectrum of ocean sciences. One of the ways we are soliciting community input is through a Virtual Town Hall: http://nas-sites.org/dsos2015/. The site provides more detailed information on the statement of task, as well as a complete list of the DSOS committee members. Please go to the website and contribute your comments regarding the top ocean science priorities for the next decade. Thank you!

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Evidence of 3.5-billion-year-old bacterial ecosystems found in Australia
ScienceDaily
Reconstructing the rise of life during the period of Earth's history when it first evolved is challenging. Earth's oldest sedimentary rocks are not only rare, but also almost always altered by hydrothermal and tectonic activity. A new study from a team including Carnegie's Nora Noffke, a visiting investigator, and Robert Hazen revealed the well-preserved remnants of a complex ecosystem in a nearly 3.5 billion-year-old sedimentary rock sequence in Australia.
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Meteorite impacts capture time capsules of the ecosystems they destroy
Ars Technica
Meteorite impacts can be very destructive. A meteorite that fell in Mexico around 66 million years ago created a 180 km crater and caused the extinction of non-avian dinosaurs while spewing debris and molten rock into the air. Now, in what is a fascinating tale of serendipity, researchers have found that these events don’t entirely destroy all traces of life at the site of impact. Molten rocks can capture and preserve organic matter as they cool down to form glass beads.
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3-D-printed fossils and rocks could transform geology
LiveScience via Fox News
Whether they're cracking open rocks or scanning tiny changes in topography, geologists already work in three dimensions. But one of the most popular attractions at the Geological Society of America's annual meeting in Denver was a 3-D printer spitting out fossils, globes and fractured rocks.
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