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Where Yellowstone's hot water comes from
Our Amazing Planet    Share    Share on FacebookTwitterShare on LinkedinE-mail article
When you think of Yellowstone National Park's famous Old Faithful geyser, you may think of its power, its size or even its reliability. But you probably don't think about where its water comes from. Unless you're a geochemist. A team from the U.S. Geological Survey in Menlo Park, Calif., recently dove into the question of just where Yellowstone's water comes from. Their findings indicate that the region — and its variety of geysers, mud pots and hydrothermal pools — could be supplied by a single water source that continuously boils, mixes and flows its way through the park. More




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NEW in GCA
GS    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Published this week - Special issue on "Environmental Records of Anthropogenic Impacts" consisting of 12 papers that address the evidence for anthropogenic contributions of trace metals and other contaminants to Earth's surface. More

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Action needed to address planned cuts to NASA's planetary science budget
The Planetary Society    Share    Share on FacebookTwitterShare on LinkedinE-mail article
On Wed., March 7, the United States Congress will hold hearings on the NASA budget, which contains a 21 percent decrease in the planetary program budget compared to last year. This is a far larger cut than proposed for any other US federal science funding program. US planetary scientists are urged to contact their Congressional representatives either directly or through a webpage created by the Planetary Society to urge them to reverse the disastrous cuts to planetary science in NASA's FY 2013 budget. More

Phosphorus and groundwater: Scientists establish links between agricultural use and transport to streams
USGS    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Scientists at the U.S. Geological Survey have, for the first time, demonstrated how aquifer composition can affect how excessive levels of phosphorous (an essential nutrient contained in fertilizers) can be carried from fertilized agricultural fields via groundwater to streams and waterways. This finding will allow for more informed management of agriculture, ecosystem and human water needs. More

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Isotope fight in magma offers clue to igneous rock formation
R&D Magazine    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Mass wins the race toward cool — and leaves a clue to igneous rock formation. In the crash-car derby between heavy and light isotopes vying for the coolest spots as magma turns to solid rock, weightier isotopes have an edge, research led by Case Western Reserve University shows. This tiny detail may offer clues to how igneous rocks form. More

Western Arctic Ocean freshwater storage increased by wind-driven spin-up of the Beaufort Gyre
Nature Geoscience    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The Arctic Ocean's freshwater budget comprises contributions from river runoff, precipitation, evaporation, sea-ice and exchanges with the North Pacific and Atlantic. More than 70,000 km of freshwater are stored in the upper layer of the Arctic Ocean, leading to low salinities in upper-layer Arctic sea water, separated by a strong halocline from warm, saline water beneath. More

The College of William & Mary geology department receives world-class mineral collection
The College of William & Mary    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The College of William & Mary Department of Geology in Williamsburg, Va., has acquired a world-class mineral collection that geologists say will be a valuable resource in the department for many years. Professor Brent Owens of the geology department was contacted about donating the collection by Dimitri Georgiadis, a Greek immigrant and mineral enthusiast, who had an interest in rocks since he was a young boy. More

First asteroid samples reveal surprising look at space rock crashes
LiveScience    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The first dust grains ever retrieved from the surface of an asteroid now confirm that these minor planets are constantly shaped by a continuous barrage of high-speed microscopic impacts, scientists find. The Japanese asteroid probe Hayabusasucceeded in returning more than 1,500 grains of dustfrom the asteroid 25143 Itokawa when it parachuted into the Australian outback in June 2010. Already, the samples from this 1,800 foot-long (550 meter) rubble pile have helped solve the longstanding mystery of where most meteorites striking our planet come from. More

Study: Ocean acidification rate may be unprecedented
ScienceDaily    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The world's oceans may be turning acidic faster today from human carbon emissions than they did during four major extinctions in the last 300 million years, when natural pulses of carbon sent global temperatures soaring, says a new study in Science. The study is the first of its kind to survey the geologic record for evidence of ocean acidification over this vast time period. More

NASA raids other budgets to fund Mars effort
MSNBC    Share    Share on FacebookTwitterShare on LinkedinE-mail article
NASA is starting the planning process for its scaled-back robotic Mars exploration program immediately and will use 2012 funds previously slotted for work on outer planets missions to shore up the effort. NASA will spend about $30 million in 2012 on its retooled Mars exploration program, a cross-agency effort known in budget documents as Mars Next Generation. More


 
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