Word: crusts
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Dates: during 1940-1949
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...more daring, Alfred Wegener of Germany, proffered an alluring theory to explain it. According to Wegener, the interior of the earth is a thick, hot, plastic substance. The continents, in large part comparatively light granite, float on it like icebergs. Under the oceans, the earth's crust is largely basalt, which is heavier than granite and inclined to sink...
Though most geologists believe that radioactive material occurs only in the earth's outer crust, geophysical research may reverse this theory...
Breakable Crust at Conway...
...Conway, Hannes Shneider and company have been losing a lot of good base wax on a breakable crust, hiding 25 to 28 inches of snow, during the past week. Forecasted flurries in the higher elevations should leaven the lumps on the upper part of the trails and the threatened cold wave may pack and settle the lower snow fields by the time the weekend rolls around...
...earthquake was the latest episode in the earth crust movement which ages ago pushed up the mountainous ridge of Japan. The active earthquake zone hugs the eastern shores of the islands from southernmost Kyushu to Hokkaido in the north. The part near the latest quake shows major activity every century...