News tagged with sediment grains
Ultra-fine coatings on sediment grains influence nitrate and sulfate storage in soil
Feb 23, 2009 |
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Tiny sediment grains are covered with a very fine-grained, complex mixture of minerals in an open fabric that results in a large surface area in contact with water between the grains. Scientists at the U.S. Geological Survey ...
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'Lost' sediments show details of polar magnetic field
Space & Earth / Earth Sciences
Feb 28, 2008 |
4.5 / 5 (6) |
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UC Davis researchers studying cores of sediment collected 40 years ago have found evidence for magnetic field vortices in the Earth's core beneath the South Pole. The results contrast with earlier studies at lower latitudes, ...
500,000 years of climate history stored year by year
Space & Earth / Earth Sciences
Mar 14, 2007 |
4.5 / 5 (23) |
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The bottom of Turkey’s Lake Van is covered by a layer of mud several hundreds of metres deep. For climatologists this unprepossessing slime is worth its weight in gold: summer by summer pollen has been deposited from times ...
Study shows more corn for biofuels would hurt water
Sep 28, 2009 |
4 / 5 (4) |
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(PhysOrg.com) -- More of the fertilizers and pesticides used to grow corn would find their way into nearby water sources if ethanol demands lead to planting more acres in corn, according to a Purdue University study.
Precise blending makes marketable product from ethanol co-product
Sep 18, 2009 |
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(PhysOrg.com) -- A Purdue University researcher has found a way to predict the nutrient content in distillers dried grains with solubles, making the ethanol byproduct more marketable as a feedstock.
Warming climate may cause arctic tundra to burn
Mar 05, 2008 |
2.2 / 5 (11) |
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Research from ancient sediment cores indicates that a warming climate could make the world’s arctic tundra far more susceptible to fires than previously thought. The findings, published this week in the online journal, PLoS ON ...
Amazon River Once Flowed in Opposite Direction
Space & Earth / Earth Sciences
Oct 24, 2006 |
4.2 / 5 (40) |
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The world's largest river basin, the Amazon, once flowed from the Atlantic Ocean to the Pacific - opposite its present direction - according to research by a geology graduate student and his advisor at the University of North ...
Martian rock arrangement not alien handiwork
Space & Earth / Space Exploration
Jan 07, 2009 |
4.4 / 5 (8) |
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At first, figuring out how pebble-sized rocks organize themselves in evenly-spaced patterns in sand seemed simple and even intuitive. But once Andrew Leier, an assistant geoscience professor at the U of C, started observing, ...
A novel, 10,000-year study of strata compaction and sea-level rise on English coast
Space & Earth / Earth Sciences
Dec 10, 2009 |
4.5 / 5 (2) |
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Environmental scientists at the University of Pennsylvania and Durham University have employed a novel combination of geological and model reconstructions of wetland environments during a 10,000-year period ...
Where Did the Uranium Go?
Oct 26, 2009 |
4.5 / 5 (4) |
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(PhysOrg.com) -- Uranium's migration through the soil depends on groundwater's chemical composition, according to a recent study by Pacific Northwest National Laboratory. Scientists showed that uraniumattached ...
Arctic climate under greenhouse conditions in the Late Cretaceous
Space & Earth / Earth Sciences
Jul 09, 2009 |
3.5 / 5 (10) |
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New evidence for ice-free summers with intermittent winter sea ice in the Arctic Ocean during the Late Cretaceous - a period of greenhouse conditions - gives a glimpse of how the Arctic is likely to respond ...
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