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In central Kansu there is a highly metamorphosed series of rocks generallyconsidered as the oldest of the province.Geologists who happen to stay inor pass through Lanchow (Kaolan) can not fail to recognize its presence,asoutcrops are found just outside the city.This series consists mainly of well-
In central Kansu there is a highly metamorphosed series of rocks generallyconsidered as the oldest of the province. Geologists who happen to stay inor pass through Lanchow (Kaolan) can not fail to recognize its presence, asoutcrops are found just outside the city.This series consists of mainly of well-