This article discusses and summarizes uraniferous characteristics of paleochannel depositional systems based on depositional characteristics of fluvial systems and geochemical behaviour of uranium.

本文通过对各类河流沉积特点研究，结合铀球化学行为，探讨河流沉积体铀性。

Compared to supersequence boundaries, the depositional hiatus at sequence boundaries is shorter and sequence boundaries are not compatible with lithostratigraphic unit boundaries.

沉积层序界面处沉积间断时间相对超层序界面要短，与岩石层单位界面往往不一致。

Ichnofabric analysis displays a rising significance on accurate environmental interpretation of sedimentary units in oil-bearing basin and precise recognition of depositional disconuities.

近年来，遗迹组分析其日益增长意义主要表现含油气层单元成因环境精确解释和各类不连续面精细识别。

These basins were generally filled with upward fining and deepening sedimentary sequence that comprises nonmarine to marine, shallow marine to deep marine depositional systems.

内堆积了从陆相到海相，从浅水到深水各种沈积体，组成向上变细和变深充填序列。

Nonmarine sequence stratigraphy is used to analyze Jurassic depositional sequences in Tu-ha basin, and three sequences and one supersequence are divided in this paper.

本文应用陆相层序层学方法对吐哈侏罗沉积层序进行了综合分析，划分出三套层序和一套超层序。

With stromatolite but no desiccation crack, the depositional environment of Middle-Late Cambrian in the area was intertidal zone to subtidal zone with the shallow-water features.

根据其中叠层石和无明显泥裂造，推测为潮间带-局限潮下带沉积环境。

The paper has summarized systematically evolutionary law in time and space on petrofacies and paleogeography of Late Paleozoic era in Northern China and distributive law of depositional systems.

根据华北晚古生代沉积岩环境标志,识别出29个相,归并为冲积扇、河流、三角洲、潮汐砂滩、碳酸盐台等6个沉积体。