Word: sediment
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Dates: during 2000-2009
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...evidence from ancient lake beds in the Northeast U.S. suggests that the dinosaurs got their big break in just the same way our ancestors did. Scientists from Columbia University's Lamont-Doherty Earth Observatory and their colleagues have found iridium, a mineral plentiful in asteroids, in sediment about 200 million years old--just when the dinosaurs started to take over the planet. Fossilized footprints show that the dinosaurs evolved very rapidly at that time, from the size of dogs to that of dragons. And fossils of fern spores suggest that these opportunistic plants had a sudden ecological opening for colonization...
...public-relations and lobbying campaign to nix the plan, and CEO Jack Welch even went to Whitman personally. The company insisted Tuesday that the dredging operation - the largest in U.S. history - would "do more harm than good," stirring up PCBs, or polychlorinated biphenyls, now safely buried under layers of sediment on the river bottom, and besides that would visit "decades of disruption" on area residents. And yet Whitman remained unmoved...
...away, says Rini Sulaiman, an environmental toxicologist with the U.S.-funded National Resources Management Program. And that, says Daniel Limbong, means the mercury contamination will eventually threaten the 400,000 people living in Manado. It could be happening already. According to Limbong, samples taken from sediment in the estuary of the Talawaan river where it empties in Manado Bay are almost at the levels seen in samples taken where the river passes the mine site, about 20 km upstream...
...impressed, on impressionable me, the great significance of knowledge and of context. The way one moves in historical spaces is different; one's affiliations, politics, interactions are different. The possibilities are ones of reaction and reassemblage in addition to mythic creation. There is a facility of interconnection: the continual sediment of meaning cross-links landscape and gesture like a fine web, echoing the flightpaths between cities and the subterranean hypertext of subways...
Though most of the sewage pipes flowing into the river have been identified and stricter regulations for storm drains have been set in place, there are still unidentified sources of pollutants, according to the officials. Sediment on the river bottom also presents a challenge to meeting the 2005 goal, for it can take years for another layer to form on top of the river bottom...