垩

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。

Many crustal zircons have the age (up to 2770Ma) that is much earlier than the formation of ophiolite considered by previous researchers, indicated the abundant subduction crust components occur in the zircons separated, which was preserved in the mantle, and outcropped with the mantle cycle process.

纯橄岩样品四个测点得到加权平均值为130.0±2.8Ma，属早白垩世，代表了纯橄岩的结晶年龄；研究中发现许多地壳成因的古老锆石(最老可达太古代2770Ma)，远远早于目前主流观点中蛇绿岩的形成时间中生代晚期，综合考虑认为所选锆石有大量俯冲地壳成分，在地幔中保存，后随地幔循环运移出露地表。

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。

Consequently, seawater transgresses from East China Sea to yellow sea and connects half graben-like basin on the shelf and sea during short period.

通过对苏北盆地钻井岩心分析研究总结得出，在晚白垩世、古新世苏北盆地曾与海相通，并遭受海侵影响。

The chalk cliff rising above the city of Dover .

英国港口多佛市的白垩崖

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。

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。