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磁性地层学是一门近年来新兴的学科.由于地磁极性变化具有全球性和同时性,这就提供了在地层形成过程中可将剩余磁性的极性变化,作为标准来进行地层对比.我国第四纪磁性地层学的工作是从七十年代初期开始的,在解决第四纪下限、第四纪地层的分层和时代、第四纪海侵层的对比和年代、古人类化石的年代等方面取得了一些成果.如得出早更新世泥河湾组地层年代为距今140—307万年左右,元谋组地层为距今150—315万年左右.北京顺 5孔中最早一次海侵的时代为距今 235万年左右.“元谋人”年代为170万年左右,“兰田人”年代为80万年左右.笔者曾
Magnetic stratigraphy is a newly emerging discipline in recent years.Due to the global and simultaneity of changes in geomagnetic polarity, it provides the stratigraphic contrast that can be used as a standard to change the polarity of the remaining magnetic during stratigraphic formation. Quaternary magnetic stratigraphy work started from the early 1970s, in solving the lower limit of the Quaternary, Quaternary stratigraphy and epoch, Quaternary transgression contrast and dating, the age of ancient human fossils And other achievements have been made.If we get the age of Early Pleistocene in the Nihe Formation is about 140-307 years ago, Yuanmou formation is about 150-315 million years ago.Beijing along the first 5 wells Invasion of the age of 2.35 million years ago. “Yuanmou” age of about 1.7 million years, “Lantian people” age of 800,000 years or so.