准层序 meaning in English
subsequence
Examples
- This prograding complex consists of several small prograding bodies . the transgressive system tract is consist of three retrogradational parasequence sets . the highstand system tract is mainly about aggradation
层序低位域是在强制性湖退背景下形成的，由三个进积型准层序组构成。 - Viewed from the ordered stacking patterns of the meter - scale cyclic sequences in the long - period sequences , twenty - six third - order sequences may be identified in the wumishan formation
因此，七级韵律层、米级旋回层和五级准层序组分别与岁差旋回、短偏心率旋回、长偏心率旋回间存在有成因联系。 - Therefore , the seventh - order rhythmites , meter - scale cyclic sequences and fifth - order parasequence sets are correlative in origin with precession of equinox cycles , short eccentricity cycles and long eccentricity cycles , respectively
常常3 - 5个米级旋回层序呈有序叠加构成五级准层序组，少数米级旋回层序还可识别出5个七级韵律层而呈现出1 5的叠加关系。 - According to the data of seism , mud well logging , well logging , cores and the principles of well correlation , this third - order sequence is divided into three fourth - order sequences ( system tracts ) and nine fifth - order sequences ( parasequence sets ) . the lowstand systems tract is formed in the background of forced lake regression , which is consist of . three prograding parasequence sets
根据地震、综合录井、测井、岩心等资料，依据井间可对比的原则，研究层段的三级层序划分为三个四级层序(即体系域)和九个五级层序(即准层序组) 。 - Moreover , the system tracts in sequence are characterized by dualistic structure , namely transgressive - highstand system tracts , and tst > hst . the parasequences are divided into three types , which is respectively dominated by sandstones , mudstones , and shallowing - upward tidal flat system . and prograding sequence and retrograding sequence are composed of stacking parasequence set
层序中体系域具有二元结构特征，即海侵?高水位体系域，且tst hst ，准层序类型有三种，分别是以砂岩为主的准层序、以泥岩为主的准层序和以潮坪体系向上变浅的准层序。