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地质学报 1948
OntheKaolanSeries, PP. 185-189 Abstract: IncentralKansuthereisahighlymetamorphosedseriesofrocksgenerallyconsideredastheoldestoftheprovince.GeologistswhohappentostayinorpassthroughLanchow(Kaolan)cannotfailtorecognizeitspresence,asoutcropsarefoundjustoutsidethecity.Thisseriesconsistsmainlyofwell-
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