摘要
根据地震反射特征、古生物组合、湖水面变化及构造变动，应用层序地层学原理，对下第三系进行层序划分，分析了地震相类型。
Tertiary stratigraphic sequences are divided by the principle of sequence stratigraphy and on the basis of seismic reflection characteristics, ancient creature composition, variation of lake level and tectonic movement. The types of seismic facies are analysed, and the distribution and characteristics of the main depositional systems are summarized.
关键词
第三纪
层序地层学
地震相
沉积体系
Shenxian
seismic reflection
unconformity
sequence
seismic facies
depositional system
