Начало » материк
На дълбочина 130-190 километра под земната повърхност скалите, от които са изградени материците, се заменят с други, които по състава си са по-близки до земната мантия. Такива са обобщените резултати на британски учени, занимавали с анализ на данни за разпространението на сеизмични вълни след силно земетресение. Така се стигнало до принципно нова преценка за дебелината […]
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