白垩的

Lower Cretaceous belong to retrograding sedimentary sequence of tide-flat-carbonate platform facies,and have good hydrocarbon source rock and reservoir rock but no good cap rock.

下白垩统属退积的潮坪—碳酸盐岩台地沉积序列，生、储油层发育，但盖层发育相对较差，有可能在靠近改则—尼玛断裂带附近形成一些与逆冲断层有关的小型油气藏。

The Jianghan basin is a Cretaceous-Paleogene rifted basin developed on Yangtze paraplatform and also a typical continental petroliferous basin containing salt layers.

江汉盆地是在扬子准地台上发育起来的白垩系—古近系断陷盆地，也是我国陆相盆地中典型的含盐含油气盆地。

The Lower Cretaceous Yingcheng Formation in which the volcanic rocks are high in content and widely distributed was developed at the late stage of rifting.

徐家围子断陷是松辽盆地内的一个较大的中生代断陷，下白垩统营城组发育于断陷晚期，分布面积广，火山岩发育。

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。

The other 5 percent of eggshells consists of a crucial "binding agent" that keeps the chalk from turning into dust and toughens he shells.

蛋壳成分的另外5％是重要的&黏合剂&，可以防止白垩灰化，并增加蛋壳硬度。

For instance, one recent report says that pirates in countries such as China and India have used chalk, dust and contaminated water to make counterfeit drugs.

比如说，最近的一份报告就显示，在中国和印度等国家的假冒伪劣商家曾经以白垩、灰尘和污染水为原料来制造假药。

No mere sea, though, could accomplish anything with this solid iron-riveted wall — which, at 50 feet from high-water mark, is four feet thick, if one inch ........

尽管单凭巨浪不可能有损于这用铁板加固的塔墙一这墙至高潮标以上五十英尺有四英尺厚，如果一英寸……灯塔所坐落于其上的基石在我看来似乎是白垩

The results show that the organic matter in the dark limestones of the lower Cretaceous is of medium abundance, good type and proper maturity. The limestones have hydrocarbon-generating potential.

研究结果表明，该盆地下白垩统暗色碳酸盐岩的有机质丰度中等、类型较好、成熟度适中，具备了形成油气的条件。

In the heart of Graves region, in the town of CAPIAN, CHATEAU LA SERRE leads a forty two hectares wide estate planted on chalky-clay, and sandy-gravely soils.

位于格拉夫中心CAPLAN镇上的拉塞古堡，是一个宽为42公顷的庄园，其泥土为粘质白垩和沙石土壤。

The sandstone bodies of this sedimentary system are buried in shallow position and in good quality of porosity and permeability.Shengbei structure zone and its south flank are the main position for sandstone and available for the north pinch out subtle traps development.Combined the background of upheaval in sag and cling to the strike-...

根据胜北洼中隆良好的古构造背景，结合胜北3、4号南北向平移断层沟通中、下侏罗统水西沟群煤系地层和中侏罗统七克台组湖相泥岩烃源岩系等情况，认为胜北洼陷白垩系是浅层次生岩性油气藏勘探的有利地区。

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。