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前言调查地区位于印度安得拉邦海得拉巴(Hyderabad)城北东30公里处,系前寒武纪花岗岩区的一部分。这个地区的下伏岩石是由花岗岩质岩石
Preface The survey area is located 30 kilometers north-east of Hyderabad in Andhra Pradesh, India, as part of the Precambrian granite area. The underlying rocks in this area are made of granite rocks