白垩的

The volcanic rocks of Early Cretaceous Yingcheng Formation contain abundant perlitic rocks and they are important petroliferous layers in Songliao basin.

松辽盆地早白垩世营城组火山岩系含有丰富的珍珠岩，为松辽盆地重要的油气勘探目的层位。

Determined the formation mechanism and their time—space distributgion pattern, the following conclusion were drawn: the key element in establish a depositional system is the identification of exceptional reflectional stracture, and the identification of the palaeodrainagte pattern have extrordinary influence on the restoration of the depositional environment.

建立了侏罗—白垩系青山口组共5个时期的沉积体系分布图，指明了沉积体形成机制和时空展布特征，并认为：识别特殊反射结构是建立沉积体系的关键，判断古水系对恢复沉积环境具有重要意义。

Investigation results demonstrate that the age of intermediate to alkaline potash rich volcanic rocks of the first cycle of the Qingshan Formation is 109.9±0.6 Ma; and the age of the acidic rhyolitic volcanic rocks of the second cycle of the Qingshan Formation ...

结果表明，青山组第一旋回中偏碱性富钾火山岩的形成年龄为10 9.9± 0 。6Ma ，第二旋回酸性流纹质火山岩形成年龄为 10 8.2± 0 。6Ma ，据此确定胶莱盆地青山组火山岩应为早白垩世岩浆活动的产物。

Type I is composed of rhyolitic rocks, which are characterized by higher Si and alkali contents and lower Al and Ti contents, Na2O/K2O1 and a weak negative Eu anomaly (δEu=0.65–0.95), enriched in Sr and Ba and poor in Rb. Types I and II probably formed in an extensional to postorogenic extensional environment, accompanied by compressional uplift.

提要：大兴安岭北段根河地区早白垩世火山杂岩按岩石及其地球化学特征，可划分为3类：第Ⅰ类为流纹质岩石，富Si，碱，低Al，Ti，Na2O/K2O1，具弱的负Eu异常(δEu=0.65～0.95)，富Sr，Ba，贫Rb；研究认为第Ⅰ，Ⅱ类岩石产于挤压隆升相伴的拉张至造山后伸展构造环境。

The volcanic rock research of Yixian Formation shows that Yixian Formation during the Early Cretaceous（ 135 - 120Ma ） is mainly composed by basalt and sanukite which are non adakite.

义县组火山岩的研究表明，早白垩世（135～120 Ma）的义县组主要由玄武岩和赞岐岩组成，并非埃达克岩。

Highprecision sequence stratigraphy was applied to divide and correlate the different sequence stratigraphical units from the Upper Cretaceous to plaeogene in the Biyang depression, and a sequence stratigraphic framework which can correlate the different sequence stratigraphical units was set up to point out that the ramp region of the northdepression is an oil and gas reservoir featured by altitude progradational delta and complex fault blocks, the inner belt of the north slope hinge zone is a low order faultlithologic oil and gas reservoir, the development stages and high order terms of the deep depressed area is a fluxoturbidite and sublacustrine fan lens trap, and the south actic region is a lithologic hydrocarbon reservoir development area.

运用高精度层序地层学的理论，系统地划分和对比泌阳凹陷上白垩统至古近系不同级别的层序地层单元，建立了凹陷内各级层序地层单元的对比框架，指出凹陷北部斜坡带为高位进积三角洲复杂断块群油气藏，北部斜坡枢纽带内带为低位扇断层-岩性油气藏、深凹区湖扩展期和高位期为滑塌浊积体及湖底扇透镜体圈闭，南部陡坡带为岩性油气藏发育区。

The Triassic of the Central European basin represents a typical marine influenced terrigenous sequence.

中欧盆地三叠系是典型的海陆过渡相沉积，松辽盆地白垩系是含有海侵事件记录的陆相河湖盆地。

But the miniplate became even softer,still opaque and easy to break with some gabs on the surface six months later.The miniplate became into something like cheese,softer and exquisite twelve months later.

扫描电镜观察可见散在的比较表浅的小裂纹和凹槽；植入后6个月时，大体观察见接骨板表面已经变成白垩色，质硬，不透明，易折断，其上有裂纹。

Chalk or limestone soils, such as marls.

例如在白垩、或泥灰这种富含石灰石的土壤中生存的植物。

Here at the base of the chalk formation he neared the brood that oozed from it.

就在那个白垩质山岗的山根下面，他走近了那条由山根下涌出来的小河流。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。