May media highlights: GEOLOGY and GSA TODAY
...he sandstone was originally deposited as windblown sand dunes, probably in a seaside dune field. These rocks are ca. 470500 Ma (Late Cambrian to Early Ordovician), nearly 40 m.y. older than the previously oldest evidence of animal life on land. The trackways were made by arthropods that possessed severa...Physics tip sheet #3 March 6, 2002
....aps.org/abstract/PRL/v88/e100404 5) Stability of sand dune fieldsarXiv preprint server Individual sand dunes are known to move downwind at a velocity dependent on height. So why dont dunes of different h...Proliferation of Argentine ants in California linked to decline in coastal horned lizards
...s "their preference for open sand, such as coastal sand dunes, and thick chaparral habitats." Many of these once-pristine, sandy coastal areas have become fragmented by developments, he explains, while chaparral habitats at low elevations, where these lizards are present, have been given low priority fo...Study links El Nio to deadly South American disease
...he disease is transmitted to humans by the bite of sand flies, much as malaria is by mosquitoes," Laughlin...event of the 20th century, the scientists compared sand fly breeding observations with weather data from NASA's Tropical Rainfall Measuring Mission (TRMM) s...January media highlights: GEOLOGY and GSA TODAY
...f quartz. The resulting ages establish that eolian sand was last mobilized in the region between ca. 7 and 5.5 ka. Although this interval corresponds to the drier Altithermal-Hypsithermal period, climate alone may not have been sufficiently arid to cause dune formation in this area. Instead, it appears th...A little larceny comes naturally to Northwestern crows
...of 30 to 50 meters. Among the available prey were sand lances, silvery fish the size of sardines that bur...worms, shore crabs and snails. Larger prey such as sand lances, clams and crabs cannot be quickly consumed, and crows that catch them often become the targe...December media highlights - GSA BULLETIN
...ach erosion is facilitated by studies dealing with sand supply and sand transport. Current research and models suggest that estuaries act as sediment "sinks" by temporarily...Lowering rates of beach erosion: estuaries may be key
...ween the tides and water moving down rivers causes sand to settle into estuaries that act as sinks. That is, the sand cannot move out of them. In the December issue of the GEOLOGICAL SOCIETY OF AMERICA BULLETIN, Michae...Clean water for Nepal is focus of MIT research
...must be carefully maintained, with exact water and sand levels, and the equipment must be fitted correctly. "So this year," said Murcott, "weve been able to recommend SODIS with more confidence, and have shown that the BSF is the best filter weve investigated to date." WORK CONTINUES Students in the cu...Large river once flowed in south Florida
...Geological Survey (USGS) indicates that an ancient sand delta in South Florida, discovered in 1999 by scientists from the USGS and the University of South Florida, rivals the size of deltaic lobes of the modern-day Mississippi River. Kevin Cunningham will present seismic and corehole data, collected alon...African bone tool discovery has important implications for evolution of human behavior
...t as old. Furthermore, a distinct sterile yellow sand horizon lies above the dark, anthropogenic (human ...rk anthropogenic sediments of more recent age. The sand layer acts as a clear stratigraphic break because any penetration through this yellow sand by younge...Researchers zero in on date of early hominids
...e ancient lake deposits - layers of clay, silt and sand - that sometimes contain fish remains and other fossils. That composition, Levi said, is what made Erk-el-Ahmar difficult to date. "Carbon dating is good only back to about 50,000 years, and it depends on the availability of charcoal or other organ...Component of fly saliva makes promising Leishmaniasis vaccine
...rasite transmitted to people through the bite of a sand fly. In a report released today, scientists from ...ow a vaccine they developed against a component of sand fly saliva prevents leishmaniasis in mice. Leishmaniasis, a major health problem in many tropical an...Wetland loss still outweighs gain despite 20 years of progress
...e materials - such as soil or sand - into a wetland to get permission from the U.S. Army Corps of Engineers before doing so. It also requires individuals to provide "compensatory mitigation" - such as creating a wetland el...Analysis of impact studies reveals how bottom fishing affects seafloor denizens
... with the most negative impacts occurring in muddy sand and gravel habitats. Surprisingly, the least impac...t sand. The studies revealed that beam trawling in sand habitats has less impact than the other gear types and other habitats. As expected, largest negative...Ancient reptile is efficient chewer
... The shape of this dentine surface indicated where sand and other particles had been jammed against the enamel, proving that the motion was backward.......placing roman candles into buckets filled with dry sand rather than holding them in your hand. (Presenter Joseph A. Domanico, chief of pyrotechnics team, Edgewood Chemical Biological Center, MD)...... ON THURSDAY, APRIL 5. Such issues as pipelining sand to combat erosion have become quite an economical,...Development Act of 1999 authorized $300 million in sand pumping and other coastal subsidies, with additional long-term maintenance costs of $330 million. At......y it was thought that lava flows disintegrate into sand as the flow enters the ocean and that this sand is the main component of ocean island volcanoes. The presence of this sand would make this giant vo......ntal interior that was buried adjacent to abundant sand dunes." The Apsaravis specimen from these terrestrial deposits reveals that the nearest relatives of the lineage including living birds were not restricted to a near shore or marine habitat and wading bird ecology , but that they were already occupyi...