·2,447,543篇论文数据，部分数据来源于NoteExpress
Extension in NW-SE direction in Eogene Period. Japan Sea pulled open in Eo-gene and completed as the patterns as nowadays in Neocene period;
古近纪时为北西—南东向拉张构造应力场，日本海从古近纪开始逐渐拉开，直到新近纪完成现在的格局；
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