Word: layered
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Dates: during 1980-1989
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...suppose there were young professors more popular with students. Jonathan had high standards and could be unbending about them. He disciplined himself to work within the sometimes strait-jacketing rules of his department. And there was no doubt a layer of reserve to be penetrated before easy conversation with him was possible. He did not have a personality that flourished at sherry parties or doughnut-and-cider klatches. Socially, he was in Harvard, but not of it. Once his shyness was breached, however, no one holding a Harvard appointment could have been more helpful, and self-effacingly...
Brown's hard asphalt track, covered with a thin layer of rubber, proved ideal for Crimson hurdlers Chuck Johnson and Kim Stevens, who cruised to victory in the 100 high and 400 intermediate hurdles, recording impressive times...
...excavations uncovered "layer upon layer of stratified human burials, decorated pottery, weapons, ornaments and a plethora of metal tools," Gorman said. A total of 18 tons of pottery, stone and metal objects were collected and transported to the UPenn museum, he added...
...heats the water and stirs up convection currents; cooler water sinks to the bottom while warmer water rises to the surface, where its heat quickly escapes into the atmosphere. In a solar pond, these currents are suppressed by dissolving salt near the bottom of the pond. That creates a layer of denser, heavier water that resists rising to the top even when it is heated by solar rays penetrating the pond. The lighter layer of water at the surface helps to contain the heat below by acting as an insulator. Since very little heat escapes, the temperature at the bottom...