Word: layerings
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Chips from the Chisel. This is the sort of record that archaeologists love. The mound represented what for many centuries was a well-built stone city of about 10,000 inhabitants. The oldest part seems to have flourished before 2500 B.C. It had no city wall, and a layer of ashes shows that its poor defense posture may have enabled an invader to burn it. When the inhabitants built a new city, they encircled it with a substantial wall...
...from west to east in mid-latitudes, often reaching 250 m.p.h. The turbulent region below the jet stream may begin as low as 15,000 ft., increasing in roughness as it nears the stream (which is not itself normally turbulent) at an average of about 30,000 ft. Another layer of CAT rides on top of the stream, reaching to 40,000 ft. There is normally some turbulence on both sides of the jet stream, but the north side is almost always the worst. No one knows...
...city, said Dr. Hall, might make good use right now of a monster reactor. Over Los Angeles a layer of warm air (an inversion) hangs for long periods and traps beneath it the city's notorious smog. Dr. Hall believes that a reactor, operating at comparatively low temperature but generating 100 million kilowatts of heat, could punch a hole in the inversion and clear L.A. of smog...
While investigators began checking up on known sex offenders in the Starved Rock area, others brought heavy tanks of liquid petroleum gas into the canyon and slowly began burning away the top layer of snow. A piece of tin foil-perhaps from the fresh roll of film in the camera-turned up; the melting snow ran off to reveal blood stains. A policeman with a broom lightly swept snow from the spot in an attempt to unearth footprints. He found none. Police squads began checking reports about an auto that had been seen at the head of the trail...
...suit deliberately admits water, but fits snugly enough to prevent it from circulating. After the diver's body warms this thin layer of water, the suit prevents heat loss to the surrounding depths. The "dry" suit is usually made of thin gum rubber, is in theory (but seldom in fact) watertight...