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一.問題的提出自從1940年左右,日本地質學家齋藤林次把鞍山附近前震旦紀地層分為鞍山統,及對面山花崗岩,今井善鄉提出首山層以後,他們所提出來的,對本區前震旦紀地層的劃分,一直為中國地質學家所採用。
I. Problem Proposal Since about 1940, Japanese geologist Saito Linzian classified the Pre-Sinian strata near Anshan into Anshan System and Opposite Hill Granite. After Imaizushan made the first mountain layer, they proposed this The division of Pre-Sinian strata has been adopted by Chinese geologists.