砂质

Using maximum flooding surface and local explosure erosion surface as the correlation framework surface in the 4-th hierarchical base-level cycles, sand-body in the 3-th hierarchical base-level cycles formed in the 4-th hierarchical base-level cycles may be correlated layer by layer. The law of the sand-body and the characters of reservoir heterogeneity formed in the 4-th hierarchical base-level cycles are discussed. The study shows:①During early period of the 4-th hierarchical base-level cycle rising, subaqueous distributary channel formed, continuously stacked vertically, and migrated in limit range laterally, and channel sand-body stretches farther longitudinally, and lacks interbeds of mud rock and siltsand in sand rock, reservoir heterogeneity is relatively weak.②During mid-period of the 4-th hierarchical base-level cycle rising, subsaqueous distributary channel migrated actively, channel divided and converged strongly to form netted sand-body and sand sheet mainly, but interbeds of mud rock and siltsand increases gradually in sand-body, reservoir heterogeneity increased.③During later period of the 4-th hierarchical base-level rising and early period of the 4-th hierarchical base-level falling, reservoir sand-body was poor, and only form thin sand-body of subsaqueous distributary channel, subsaqeuous creveas and distal mouth bar, sand-bodys are surrounded by mud and silt rock.

进一步采用以第4层次基准面旋回中相当最大湖泛面的相转换面和具有区域性暴露侵蚀作用的层序边界面为等时地层对比框架的边界，对发育于MSC2—MSC4三个第4层次基准面旋回的第3层次基准面旋回内砂体进行了逐层等时对比，探讨第4层次等时地层对比格架内储集砂体发育分布规律，及储集砂体的非均质性特点，研究发现：①第4层次基准面上升初期发育的水下分流河道，砂体呈连续叠置、侧向迁移受限，纵向上呈长距离延伸的带状产出，砂体间泥、粉砂岩夹层少，储层非均质性相对较弱；②在第4层次基准面上升中期发育的水下分流河道侧向迁移活跃，纵向延伸过程中分流汇合作用强烈，以形成网状或席状连片砂体为主，但砂体间泥、粉砂岩夹层逐渐增多，储层非均质性增强；③第4层次基准面上升晚期和下降早期，不利于储集砂体发育，仅出现少量薄的水下分流河道、水下决口扇、远—河口砂坝砂体。

Tulips prefer a sandy-based soil that is well-drained.

郁金香喜欢砂质土壤基础是良好的排水。

Predepositional ichnocoenosis mainly occurred in thin-bedded fine sandstone, siltstone and silty mudstone, belonging to shallow lacustrine deposits under normal climate condition.

沉积前遗迹群落主要产在属于正常天气下浅湖相薄层状粉、细砂岩和粉砂质泥岩沉积中。

Many deeply fossilized items were found from the thin-beded red sandy clay: r 36 species of mammalian fossils, including thick-jawed giant deer, Saber-tooth tiger, Horse, etc.

化石多半产自薄层的红色砂质土中，石化程度深，化石数量大，保存好，有肿骨大角鹿、更新獐、剑齿虎、大丁氏田鼠、三门马和双角犀等36种哺乳动物。

We have observed the structure of these dune sands and analyzed the grain-size,surface textural features and several main chemical elements of them,the results showed that:(1) these dune sands have some eolian structure characteristics which are similar to the recent dune sands;(2) they are also similar to the recent dune sands in grain-size components,and parameters of Mz,?滓,Sk and Kg,as well as in several main chemical components;(3) the scatter plots of Mz-?滓,SiO2-Al2O3+TOFE and the probability curves of grain-size showed that these paleo dune sands are different from paleosols and fluvio-lacustrine facies but are consistency with recent dune sands;and(4) the quartz sands have well roundness and some surface textural features such as dish-shape pits,crescent-shape pits,pockmarked pits,upturned cleavage plates,siliceous precipitates and siliceous crevasses,indicating that they had been carried for a long time by the wind.

对这些沙丘砂的沉积构造观察以及粒度、扫描电镜和常量化学元素分析结果表明：(1)这些沙丘砂具有与现代沙丘砂相似的风成沉积构造特征；(2)粒度及其参数--Mz、σ、Sk和Kg，以及主要化学组分SiO2、Al2O3和TOFE也与现代沙丘砂相近；(3)Mz-σ、SiO2-Al2O3+TOFE散点图和概率累积曲线显示这些沙丘砂与萨拉乌苏组中的河湖相、古土壤差别明显，而与现代沙丘砂一致；(4)石英砂颗粒具有良好的磨圆以及碟形坑、新月形坑、麻坑、上翻解理薄片、硅质沉淀和硅质裂纹等表面结构特征，反映其曾受持久的风力搬运作用。

Domestic companies to introduce advanced production equipment, production and processing dried Mica Powder, Mica Powder wet system, ordinary quartz sand, semi-refined quartz sand, fine quartz sand, high purity quartz sand, limestone, calcium carbonate, precipitated calcium carbonate, dolomite powder , vermiculite powder, feldspar powder, maifanite, tourmaline, bauxite, sand, pebbles, sand, building sand and other non-metallic mineral products, according to river sand, maifanite, tourmaline , bauxite General diversified enterprises.

公司引进国内先进生产设备生产加工干制云母粉、湿制云母粉，普通石英砂、半精制石英砂、精制石英砂、高纯石英砂，石灰石、重质碳酸钙、轻质碳酸钙，白云石粉，蛭石粉，钾长石粉，麦饭石，电气石、铝矾土，彩砂，鹅卵石，河砂、建筑砂等非金属矿产品，可根据河砂、麦饭石、电气石、铝矾土等多元化综合型企业。

The reasons of the silty mudstone disintegration are the expansion of water, the dissolution of cement, the tension stress and the tensile stress caused by dry-wet cycle of the rock.

粉砂质泥岩的崩解是由岩石浸水膨胀、胶结物溶解和干湿循环产生的拉应力与张应力共同引起的。

The dynamic response of the large crosssection shallow tunnels in new sand loess under viscouselastic boundary is calculated by means of transient dynamic FEM so as to find out the weak points of the lining and the stress, deformation and safety of the tunnel structure.

对大断面浅埋砂质新黄土隧道，利用瞬态动力学有限元方法，计算了粘弹性边界条件下，隧道在Ⅷ度地震荷载作用下的动力响应，找出衬砌的薄弱部位和结构的受力、变形及安全性，为设计提供指导和参考作用。

The exchange of substances between deposited sediments and overlying water must also pass through the DBL. In this study, two series of flume experiments with and without wind blowing conditions were conducted to study the salt release process from sandy sediments in a polder reservoir. The thickness of DBL was directly measured. The experimental salt fluxes through the DBL under the two wind conditions were inter-compared and compared with the estimations using the Fick's first law in an effort to explore the role of DBL in contact inhibition of salt release.

通过无风和有风条件下两组沉积物盐分释放实验，研究海湾水库砂质沉积物－水界面扩散边界层的形成情况，并通过水动力扰动下穿过扩散边界层的实测盐分通量与Fick第一定律理论计算通量的比较，以及扰动与无扰动时通量的比较，探讨扩散边界层对沉积物盐分释放的影响。

And they lay their egg capsules in sandy shallows bathed by the warmer Agulhas Current.

它们在厄加勒斯暖流经过的砂质浅海处产卵

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。