Word: rim
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Dates: during 1950-1959
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Neighborly Dependence. Yet, despite the violence through which they lived, no province in Europe today seems more blessed with tranquil beauty than Flanders. The soft greys and greens of sand dune, marsh and meadow blend imperceptibly with the pale blues of the sky's rim, along an endlessly level horizon. Ornate old cities, which have known and outgrown greatness, nurse their memories amid a neat patchwork of fields where golden wheat and rye shimmer at each passing breeze. Turning idly in the same soft breeze, the sails of windmills urge the sluggish water along a network of canals which...
...some cases, he says, such reefs were raised above the water, probably by changes of sea level because of ice ages, to become full-fledged islands. Then furious tropical rain went to work on the porous coral, dissolving it. The center of the island eroded faster than the rim, particularly if it had picked up a layer of soil. Reason: the soil contributed acids that attacked the limestone...
...soft coral of the rim, by alternate solution and recrystallization, was "casehardened" into solid rock that eventually stood in a high wall around most of the island. Then after the once-flat coral reef had eroded into a saucer, MacNeil believes, the sea rose again and flooded the low center. When the sea rose high enough, more coral grew on the high rim, building it up and forming the familiar shape of an atoll...
Geologist MacNeil is prepared to offer two kinds of evidence to support his stand. First, there are actually many islands, standing well above sea level, whose high rims and comparatively low centers could very well have been formed by the process he describes. Second, and even more convincing, the theory has survived a realistic laboratory test. A block of limestone, he reports, sprayed with dilute hydrochloric acid to approximate the effect of long-continued rain, erodes into a shallow saucer with a raised rim...
...mile edge of the Red River Delta. The French, anxiously awaiting reinforcements from Europe and North Africa, still believed they could hold. The position on the eve of the Delta battle: Communists: Giap has deployed two infantry divisions and one heavy-weapons division against the Delta's northern rim; he has two divisions ready in the south...