1972年秋,在琵琶湖底打了深达200米的钻孔,采取了大致为全长的直径7厘米的岩心。从堀江正治(1972)发表的扼要报告中可以了解,这一钻孔岩心的分析涉及到许多方面。本文在讨论测定结果的同时,也涉及到有关湖底堆积物磁化测定的意义和问题。 In the autumn of 1972, a deep hole of 200 meters was drilled at the bottom of Lake Biwa, and a core of approximately 7 cm in diameter was used. As can be seen from the summary report published by Masayoshi Horie (1972), the analysis of this borehole involves many aspects. This article discusses the determination of the results, but also related to the lake sediment magnetization measurement significance and problems.