Word: magma
(lookup in dictionary)
(lookup stats)
Dates: during 1970-1979
Sort By: most recent first
(reverse)
Mount Usu had last erupted in 1945. Since then, magma, or semimolten rock from the mantle surrounding the earth's core, had been slowly and quietly rising through cracks under the peak of the mountain, building up tremendous pressures and triggering repeated earth tremors that rocked Hokkaido. Finally, on Aug. 7, the 725-meter (2,400-ft.) Usu awakened with a roar like that of a bomb. A huge black cloud soared to a height of 12,000 meters (39,000 ft.). A dense shower of gray ash and chunks of porous, rock-like pumice poured...
...separately printed booklet about Centennial, "is to create a universe." The reader is warned. "Three billion, six hundred million years ago," Michener begins, "the crust had formed, and the cooling earth lay exposed to the developing atmosphere." The next 110 pages are taken up with discourses on magma and glaciers, the planet's prehistoric upheavals. Then come the prehistoric beasts, which the author vaguely anthropomorphizes: a lovely Diplodocus wandering in the muck "toward dusk on a spring evening one hundred and thirty-six million years ago" finds herself growing "irritable...
Potentially the most promising geothermal sources lie in areas where molten rock, or "magma," is fairly close to the earth's surface. In theory, engineers can sink twin wells as deep as 20,000 feet to the hot underlying rock and then fracture it. Clean water, pumped down one hole, would be heated by the broken-up magma and would return up the other well as steam...
...copper settlement, between Magma Copper Co. and negotiators for a coalition of two dozen unions, gives 3,000 Magma workers a 31% increase over the next three years. At week's end some 32,000 workers, represented by the United Steelworkers of America (U.S.W.), were still on strike against other copper companies, but both sides were expected to accept the Magma package...
...Magma. Etna's fireworks have provided Europeans with one of the most exciting spectacles in years, and tourists flooded to the region. There were also more serious visitors: the numerous volcanologists and other earth scientists who are clambering over Etna's slopes, hoping to learn more about the processes at work inside the mountain. Most volcanoes lie near the meeting place of the massive, slow-moving plates that are believed to make up the earth's outer shell. Their crunching movements apparently cause cracks in the earth's crust that enable hot material known as magma...