Word: sedimentality
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...need for Venetian water control has never been greater. Especially high tides have caused major floods 10 times in the past 67 years alone, most disastrously in 1966, when the water in parts of the city climbed to more than 6 ft. Compression of sediment under the city, along with rising sea levels, often causes smaller floods, shutting down businesses and making sidewalks and squares impassable...
...begin solving this puzzle, scientists working in the Dry Valleys need climate records that extend over a longer period of time, and now it appears they may finally have them. In November, the University of Illinois' Doran and his colleagues retrieved a series of sediment cores from the bottom of three lakes that march up Taylor Valley like Cyclopean footprints: Fryxell, Hoare and Bonney. These cores are layered like the pages of a history book, and the record of geochemical shifts they contain can be used to reconstruct lake levels and stream flow for past centuries. Doran thinks that...
...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...
...beds in the Northeast U.S. suggests that the dinosaurs got their big break in the same way our ancestors did, through a cataclysm that killed off competing species. 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. 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 also 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...