News articles tagged with 'sediment' (Page 2)
Lake-effect theory sinks, but quake timing questions go on
— 11 Feb 2011 15:45 | Geology and palaeontologyA chronology of 1,000 years of earthquakes at the southern end of the San Andreas Fault nixes the idea that lake changes in the now-dry region caused past quakes. However, researchers…
Mercury in Bay Area fish a legacy of California mining
— 26 Jan 2011 18:10 | EnvironmentMercury contamination, a worldwide environmental problem, has been called 'public enemy No. 1' in California's San Francisco Bay…
Natural dissolved organic matter plays dual role in cycling of mercury
— 13 Jan 2011 16:57 | EnvironmentNature has a bit of a Jekyll and Hyde relationship with mercury, but researchers at the Department of Energy's Oak Ridge National Laboratory have made a discovery that ultimately could…
Freshwater methane release changes greenhouse gas equation
— 8 Jan 2011 13:39 | EnvironmentAn international team of scientists has released data indicating that greenhouse gas uptake by continents is less than previously thought because of methane emissions from freshwater…
Bering Sea was ice-free and full of life during last warm period, study finds
— 14 Dec 2010 20:03 | EnvironmentDeep sediment cores retrieved from the Bering Sea floor indicate that the region was ice-free all year and biological productivity was high during the last major warm period in Earth's…
Many coastal wetlands likely to disappear this century
— 2 Dec 2010 19:01 | EnvironmentMany coastal wetlands worldwide - including several on the U.S. Atlantic coast - may be more sensitive than previously thought to climate change and sea-level rise projections for the…
LIDAR applications in coastal morphology and hazard assessment
— 23 Nov 2010 18:32 | EnvironmentSouthampton scientists along with colleagues in New Zealand have used a sophisticated optical mapping technique to identify and accurately measure changes in coastal morphology following…
As Arctic temperatures rise, tundra fires increase, researchers find
— 18 Nov 2010 11:51 | EnvironmentIn September, 2007, the Anaktuvuk River Fire burned more than 1,000 square kilometres of tundra on Alaska's North Slope, doubling the area burned in that region since record keeping…
Novel ocean-crust mechanism could affect world's carbon budget
— 16 Nov 2010 12:27 | EnvironmentThe Earth is constantly manufacturing new crust, spewing molten magma up along undersea ridges at the boundaries of tectonic plates. The process is critical to the planet's metabolism,…
Geologists revisit the Great Oxygenation Event
— 20 Aug 2010 10:27 | Geology and palaeontologyIn 'The Sign of the Four' Sherlock Holmes tells Watson he has written a monograph on 140 forms of cigar-, cigarette-, and pipe-tobacco, 'with coloured plates illustrating the difference…