Word: cratered
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Working under Rear Admiral George J. Dufek, commander of Operation Deep Freeze Three, Linehan set off three blasts of TNT in a 48-ft. crater not far from Paul Siple's camp. (The crater had been made by an air-dropped tractor that dropped too far too fast.) The sound wave took .4 seconds to reach solid rock beneath the ice and return. Linehan calculated that the bedrock is 903 ft. above sea level. Over this is "very dense" ice 8,200 ft. thick, topped by a 20-ft. belt of "hard" ice. In turn, the hard-ice belt...
...caravan of eight vehicles circled to a stop in the morning fog that lay on the floor of the open-pit Minnesota iron mine. With swift precision, the coveralled men of the launching crew lowered an eight-foot metal capsule-an elongated vacuum bottle-to the crater floor and attached to it a gigantic (280 ft. high), pear-shaped polyethylene balloon. Within the capsule, a balding Air Force space surgeon named Dave Simons stirred impatiently in his tight little world...
Under the burning sun of California's Mojave Desert last week, power shovels chewed into a sticky, greyish substance at the bottom of a quarter-mile-wide, 137-ft.-deep crater in the desert floor. In the past year huge machines had scraped off 7,000,000 tons of earth to expose this mineral prize: the world's largest known deposit of borax. To the housewife, borax is merely a household cleanser, 'but to industry it is the chief source of boron, a new wonder element and Jack-of-all-trades that can be used in everything...
...meet the rapidly expanding demand for borax. U.S. Borax & Chemical Corp., the world's largest borax producer, last week began operating a huge new plant perched on the edge of the crater at Boron, Calif. It will process ore straight from the open-mine pit, thus cut transportation costs, eventually replace facilities elsewhere. U.S. Borax intends to boost production 30% through its $20 million expansion program at Boron, knows now that it will have no trouble selling all it can turn...
Since the March 1954 thermonuclear test explosion in the Marshall Islands, the Naval Radiological Defense Laboratory at San Francisco has been checking the radioactivity of animals, plants, materials, etc., in the vicinity of the crater. In Science, Herbert W. Weiss and William H. Shipman tell what they found when they checked the flesh of two giant "killer" clams (Tridacna gigas) collected last year from the shore of Rongelap atoll, 150 miles away from the South Pacific test site...