查询词典 depositional

Four rapid depositional periods such as 12.3~12.1 ka BP, 7.5~7.3 ka BP, 5.9~5.2 ka BP, and 1.5~1.3 ka BP disclosed by Core EC2005 well correspond to the worldwide Younger Dryas, 7.3 ka cold event, Neoglaciation or 5.5 ka cold event, and 1.4 ka ice rafted debris event, respectively. The worldwide 8.2 ka event is also well recorded in the core.

东海内陆架浙-闽沿岸泥质带EC2005孔存在的4个百年时间尺度上快速沉积事件：12.3~12.1 ka BP、7.5~7.3 ka BP、5.9~5.2 ka BP和1.5~1.3 ka BP，与新仙女木事件、7.3 ka BP冷事件、第二新冰期(5.5 ka BP强降温事件)以及北大西洋1.4 ka BP浮冰事件均有良好的对应，世界范围内广泛存在的8.2 ka冷事件对本钻孔沉积也形成了一定影响。

In living space, the Wenghui Biota can be redivided into"Upright Community","Depositional Surface Community", and"Super-water Community", to form a primordial tri-dimension ecosystem.

瓮会生物群在空间上可分为&挺立群落&、&沉积表层群落&和&水体上层群落&，而构成了一个原始而相对完整的生态系统。

The first sequence in the lower part is one subaqueous-fan~fan-delta depositional system which was caused by alluvial fan intruding lake basin; the lake transgressive system tract and high-stand system tract each contain one coal-seam group; and thick coal seams develop at the edge of subaqueous fan retrograded by lake transgressive system tract and in the region appropriately covered with water in the fan delta of high-stand system tract.

八道壕组可分为三个三级层序，下部第1层序( Sq1)为冲积扇注入湖盆形成的水下扇-扇三角洲沉积体系，湖侵域和高位域各含一个煤组，湖侵域退积的水下扇边缘和高位域扇三角洲平原都有厚煤层发育。

The study of the depositional structure of ancient crevasses splays by means of sedimentology and paleomagnetism is important for the floodplain. While the research on ancient trees, peats and pollens caused by paleoflood is useful to paleoflood discrimination.

在洪泛平原区，对古溃口扇采用沉积学、地球物理学方法研究其沉积结构，对确定古洪水事件具有积极意义；通过古洪水所产生的埋藏古树、泥炭及沉积物中花粉的研究也有助于对古洪水事件的识别。

The Olmos Formation in the Gold River North field is characterized by a shelf-edge deltaic system, from which five types of depositional systems are identified:(1) fluvial plain, which is characterized by fluvial channels, crevasse splays, and swales;(2) deltaic plain, which consists of distributary channels, levees, and crevasse splays;(3) deltaic-front mouth bars and sheet sands;(4) prodelta, which is composed of silty sediments; and (5) incised valleys, which were formed during subsequent lowstand erosion on exposed deltaic sediments.

美国南得克萨斯地区Webb县Gold River North油田上白垩统Olmos组钻井资料较少，采用地震沉积学方法对其分析，可以识别出一套完整的三角洲体系，其中包括前三角洲亚相、三角洲前缘亚相、三角洲平原亚相、曲流河相和下切谷沉积等，其中河道砂、河口砂坝和下切谷沉积物是有利的储层。

However, the ratio of the unsaturated and saturated fatty acid amide is relatively stable in downcore indicating that there is no selectivity between those two types of fatty acid amides during diagenesis processes, including biological, chemical and physical degradation. For this reason, we suggested that the depositional environment in Qarhan paleolake was relatively aerobic during the organic component deposition.

另一方面，不饱和脂肪酸酰胺与饱和脂肪酸酰胺的相对量的比值在剖面上并没有呈现明显下降的趋势，说明各种生物、物理及化学作用对饱和与不饱和脂肪酸酰胺的降解过程不存在明显的选择性，指示了有机质在沉积过程中处于一个偏氧化的环境。

Sedimentary system of coal-bearing series, depositional system of coal-bearing series ...

含煤岩系中有成因联系的一套沉积相的规律组合。

Cyclicity character is one of the most important attributes of depositional strata, and it looks more important in the terrestrial sediments.

旋回性特征是沉积岩层最为重要的属性之一，尤其在对于区域地质背景波动做出敏感响应的陆相盆地沉积序列当中更是如此。

Although it is difficult to describe the third-order sequences of one second-order sequence with the same sequence-model, they have the same bottom boundary , and common depositional cyclicity.

尽管尚不能用一个简单的层序模式去描述一个二级层序内的各三级层序，但它们在底部边界和内部的沉积旋回性上是相似的。

Which are consistent to the source rocks relating to evaporite depositional environment within the lower part of Xingouzui Formation and the upper part of Shashi Formation in the study area.

对江汉盆地西南缘12个原油样品中含硫化合物分布特征的研究表明，原油中二苯并噻吩系列化合物和苯并萘并噻吩系列化合物分别占芳烃总量的4.61%~9.79%和0.27%~1.32%，与烃源岩中含硫化合物的含量一致，反映原油中含硫化合物的含量与沉积环境有关。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。