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17 April 2014 12:48 pm ,
Vol. 344 ,
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Enough Sand to Bury Manhattan
19 March 2012 3:38 pm
Hundreds of thousands of years ago, undersea geysers spewed more than 10 cubic kilometers of sand across the floor of the North Sea. Researchers discovered the resulting blob of material—by far the largest single volume of sand ever extruded from an underground reservoir, they claim—by studying seismic data and samples drilled from the ocean bottom during oil and gas exploration off the southwestern coast of Norway. The fine- to medium-grained sand in the layer (depicted above in various shades of red, green, and blue; samples drilled from sites marked with red dots) covers an area of at least 260 square kilometers and is 125 meters thick in some spots, the researchers report online today in Geology. Large volumes of sandy water spewed from beneath a thick, impermeable layer of clay and onto the ocean floor during a lengthy period, possibly on and off for many decades, sometime between 400,000 and 2.6 million years ago, the researchers say. The volume of sand in the layer, which has been long smothered by seafloor sediments that have accumulated since its eruption, is enough to bury all of Manhattan to a depth of 160 meters.
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