Word: seismically
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Dates: during 1960-1969
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...that the moon was made of earthlike layers. Now more careful study is showing that these initial ideas have almost as many holes as the moon itself. Not only have the rocks sprung such chemical surprises as an unusually high content of titanium, but the moon's seismic activity is also not what it had seemed...
...geologically alive. Now, says Geophysicist Gary Latham of Columbia University, investigators think that the patterns may have been caused spuriously by the seismometer itself. Yet, even while it seemed to be working well, says Latham, the seismometer detected only infrequent, relatively small lunar rumbles. He accounts for that odd seismic behavior by speculating that the moon contains a large amount of cold, fragmented material that would diffuse any shock waves...
...feldspar and olivine-both found on earth. Other information came by radio from the lunar surface itself. Despite fears that the intense heat of the two-week lunar day might ruin its intricate mechanism, the seismometer left behind at Tranquillity Base continued to function, recording more than two dozen "seismic events." Some of the tracings seemed remarkably like shocks recorded during quakes on earth. Other signals pointed to the possibility of lunar landslides, set off in crater walls by the dramatic temperature changes that range from a high...
These findings are beginning to suggest that the moon may well prove to be far more like the earth than many scientists had imagined. Study of the patterns of seismic events, NASA geologists say, seems to indicate that the moon, like the earth, may be a multilayered body with a basaltic crust perhaps twelve miles thick (v. a maximum of 25 miles on earth), and a hot interior core. Apollo's preliminary findings are also persuading some distinguished scientists to consider re-examining their lunar theories. Among them is Nobel Chemistry Laureate Harold C. Urey, long a proponent...
...Hole. Costly seismic surveys that backers now insist on have also tended to add to wildcatters' expenses. Oil has become harder to find in the continental U.S. as obvious geological structures have been exploited. Since 1963, Wildcatter Carl W. Van Wormer, who was once worth $300,000, has drilled 20 consecutive dry holes and has moved from a suite of four offices into a cubbyhole in Houston. Keegan Carter, of Kilgore, Texas, last hit oil three years ago. The whole town of Kilgore is in an economic decline, as are such once-wealthy wildcatting communities as Overton, Henderson...