Word: silt
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Asked for help, Britain's Atomic Energy Research Establishment at Harwell cooked up some glass spiked with radioactive scandium and ground it down until its particles were the same size as the Thames silt. Two drums of the hot stuff were dumped by derrick on the bottom of the Thames. Then scientists armed with Geiger counters traced the movement of the radioactive particles. Some of them were found eleven miles upstream, confirming the worst suspicions of the Port of London Authority...
...continents and deposited their sediment far out on the bottom of the ocean. Most of the sediment, he thinks, was carried down in remote geological ages. The turbidity currents probably started near land. They cut deep gorges (e.g., the famous Hudson Canyon) in the continental slopes and dumped their silt and sand in deep basins in the irregular ocean bottom. When the nearest basin was full, the mud-river ran across it just as a river would do on dry land, and started to fill the next basin. The canyon just found east of Philadelphia is probably...
...prove this theory the Columbia scientists took cores of the material that forms the abyssal plains. They found what they hoped to find. On top is a thin layer of "lutite," very fine silt deposited from still water. Below it is the coarse sand that was carried over the sea bottom for hundreds of miles by mighty under-ocean rivers...
...into the Sinai and Negeb like locusts when Roman and Byzantine authority declined. They demolished vaults, run-off canals and 300-ft. reservoirs. Their goats and camels pushed over terraces, broke fencing, ate the water-hugging groves of trees and stunted tamarisk, and sent the area back to desert. Silt choked the irrigation canals, sand jammed the thousands of storage cisterns, salt caked the wells. And on the Nabatean dew mounds, carefully constructed 2,000 years ago of millions of pebbles to catch and condense the desert morning dew and trickle it onto the seeded earth below, buzzards took...
...many wrecks, some of them stuffed with well-preserved art objects, await the diving diggers. Those that lie near the shore in clear water are apt to be damaged by wave action and madre growths. Those that lie deeper or near the mouths of rivers which cover them with silt are better preserved, but are also harder to find and explore. Archeologists, Diolé thinks, should be taught to dive...