The first survey of methane vent sites off Washington's coast finds 1,778 bubble columns, with most located along a north-south band that is in line with a geologic fault.
Continental rift valleys are huge fractures on the surface of the Earth that break continental plates with the eventual development of new oceans. Although instrumental in driving climate and biosphere in certain regions, this process is poorly documented and understood. In a new study, an international group of scientists has shed new light into the recent evolution of the African rift valley by conducting fieldwork, and integrating the results with laboratory analysis of volcanic rocks, analysis of the seismicity, morphology and numerical modelling.
When consumed in contaminated water, the microscopic parasite Cryptosporidium can cause symptoms of stomach cramps, diarrhea and fever. Now, researchers reporting in the ACS journal Environmental Science & Technology have detected evidence of the parasite in about 40 percent of surveyed wells in public water systems in Minnesota -- even wells not influenced by surface water. The team emphasizes that they don't know whether the parasite levels are high enough to actually cause health concerns.
A scientific study describes for the first time the submarine cartography of a high-latitude system in the IBIS channel, which covers tens of kilometres in the northern western area of the Barents Sea, in the Arctic Ocean. This channel is one of the few submarine valleys in polar latitudes that kept its geological architecture during the Last Glacial Maximum (LGM).
'Surprisingly, we found that biotic, or living, interactions are crucial in shaping biodiversity patterns even in the extreme ecosystems of the Antarctic Dry Valleys.'
A young researcher at EPFL has demonstrated that the viscosity of fluids present in faults has a direct effect on the intensity of earthquakes.
New research led by the University of East Anglia reveals that sharp variations of the surface of volcanoes can affect data collected by monitoring equipment.
A team of Arizona State University scientists has been using the latest space technology, combined with ground measurements, to assess the health of one of the nation's most important sources of underground water, a large aquifer system located in California's San Joaquin Valley.
A team of scientists at Penn State University set out to determine if nutrient history changed the function of soil microorganisms. The answer seems to be yes, and that soil treated with high amounts of phosphate can result in poorer plant performance, but even more intriguing, it appears that the soil microorganisms from this conditioned soil can negatively impact plant yield.
For the entire history of our species, humans have lived on a planet capped by a chunk of ice at each pole. But Earth has been ice-free for about 75 percent of the time since complex life first appeared. This variation in background climate, between partly glaciated and ice-free, has puzzled geologists for decades.