【摘要】 凝缩段是厚度极薄的海相地层单位,由一种沉积速率极缓慢的深海相沉积物组成。区域上,它们在最大海进期间的延伸最为广泛。凝缩段能将由远海微体化石带证实的年代地层构架与近岸浅海沉积层序的物理地层连接起来,因此它是一个联系浅水与深水沉积相的物理地层纽带,通过地震、测井以及露头资料的分析即可识别。凝缩段在区域性和全球性地层对比中起着极为重要的作用。更多还原

【Abstract】 Condensed section is a very thin sequence stratigraphy unit and consists of pelagic facies and bathyal facies deposits through very slow aggregation during transgression period. Condensed section can connect chronostratigraphic units proved by pelagic microfossils and neritic strtigraphy. Recognition of condensed section through seismic, well logging and outcrop observation is of great geological significance for global worldwide stratigraphic division and contrast.更多还原