News tagged with anoxic sediments
Jurassic Park from a Swiss lake?
Mar 12, 2009 |
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Ecological changes caused by humans affect natural biodiversity. For example, the eutrophication of Greifensee and Lake Constance in the 1970s and 1980s led to genetic changes in a species of water flea which ...
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Nitrate stimulates greenhouse gas production in small streams
Mar 30, 2009 |
3.3 / 5 (3) |
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Nitrous oxide is a potent greenhouse gas that has been accumulating in the atmosphere since the industrial revolution. It is well known that fertilizer can stimulate nitrous oxide production in soils, but less is known about ...
Slices of living brain tissue are helping scientists identify new stroke therapies
Jan 21, 2009 |
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Slices of living human brain tissue are helping scientists learn which drugs can block the waves of death that engulf and engorge brain cells following a stroke.
Important role of groundwater springs in shaping Mars
Space & Earth / Space Exploration
Dec 11, 2008 |
4.3 / 5 (9) |
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Data and images from Mars Express suggest that several Light Toned Deposits, some of the least understood features on Mars, were formed when large amounts of groundwater burst on to the surface. Scientists ...
Arctic river deltas may hold clues to future global climate
Space & Earth / Earth Sciences
May 18, 2009 |
4 / 5 (7) |
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Scientists struggling to understand how Earth's climate will change in the next few decades have neglected a potential treasure trove of information—sediments deposited in the ocean by major Arctic rivers such as the Colville ...
New Blow for Dinosaur-Killing Asteroid Theory
Space & Earth / Earth Sciences
Apr 27, 2009 |
4.4 / 5 (29) |
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(PhysOrg.com) -- The enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a paper ...
Ultra-fine coatings on sediment grains influence nitrate and sulfate storage in soil
Feb 23, 2009 |
5 / 5 (1) |
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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 ...
Prussian blue linked to the origin of life
Dec 14, 2009 |
4.7 / 5 (6) |
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A team of researchers from the Astrobiology Centre (INTA-CSIC) has shown that hydrogen cyanide, urea and other substances considered essential to the formation of the most basic biological molecules can be ...
Paleozoic 'sediment curve' provides new tool for tracking sea-floor sediment movements
Space & Earth / Earth Sciences
Oct 02, 2008 |
4 / 5 (3) |
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As the world looks for more energy, the oil industry will need more refined tools for discoveries in places where searches have never before taken place, geologists say.
River delta areas can provide clue to environmental changes
May 11, 2009 |
3 / 5 (4) |
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Sediments released by many of the world's largest river deltas to the global oceans have been changed drastically in the last 50 years, largely as a result of human activity, says a Texas A&M University researcher who emphasizes ...
Six North American sites hold 12,900-year-old nanodiamond-rich soil
Nanotechnology / Nanomaterials
Jan 01, 2009 |
4.7 / 5 (15) |
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Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous ...
List of search results for anoxic sediments
