地质时期

Works on marine micropaleontology in China started in the late 1950's, and in the last thirty years, the marine micropaleontology in China has been greatly expanded into a full-fledged discipline that includes taxonomy, ecology, sedimentology, biostratigraphy, paleoenvironmental analysis and geologic resources prospecting, and deals with finding and explaining various species buildup, ecologic condition, sedimentary distribution, and their historical processes.

中国的海洋微体古生物学研究开始于20世纪50年代末，当时属于起始摸索阶段。真正发展并奠定基础的时期是在近30年以来，较为全面地开展了分类学、生态学、沉积学，生物地层学、古海洋环境分析与地质资源勘探应用研究等。

Different kinds of fossil brachiopod shells have different preservation.

6地质历史时期不同类别腕足化石壳体的保存程度可能不同。

Generally, three kinds of methods, including microstrocture, cathodoluminescence and trace element concentration analysis, are applied to verify the preservation state of original geochemical information preserved in the articulate fossil.

低镁方解石腕足化石壳体被广泛地应用于地质历史时期原始海洋地球化学组成的重建研究，其保存度的识别是该研究的一项重要内容。

Recently extinct species were more similar to living species than those from earlier eras, and as he had seen in South America, and William Clift had shown in Australia, fossils from recent geological periods resembled those still living in the same area.

最近灭绝的物种相比较早时期灭绝的那些物种与活的物种更类似，象他在南美洲所看到那样，象威廉·克利夫特展示的澳大利亚那样；最近地质时代的化石类似于仍然生活在同一地区的物种。

Cretaceous period of geologic structure, and creating a unique side of the characteristics of rare stone resources.

白垩纪时期的地质结构，造就了独具一方的特色稀有石材资源。

A schematic model was proposed to illustrate the occurrences of various lithologies and lithofacies associations. The erosional surfaces on siliciclastic mudstones, funnel-shaped structure, and the exhuming of massive cold-seep carbonates exposed might have been occurred concurrently during a tectonic unstable time in SW Taiwan. The deposition of fossiliferous mudstone interfingered with the conglomerate lithofacies, and represented the rapid facies transition from siliciclastic (non-carbonate) into carbonate environment.

综合岩相观察结果，建构一个符合台湾西南部更新世珊瑚礁与基底泥岩接触关系的沉积相模式；其中，基底泥岩顶部的不规则冲蚀面、充填碳酸盐胶结泥岩砾与碳酸岩烟柱的漏斗状沉积，以及块状冷泉碳酸盐岩的出露，可能均为区域地质构造活动时期所造成；至於与含化石泥岩同时沉积的砾岩相，可能均为基底泥岩在快速浅化的过程中所沉积，标志古环境由矽质碎屑快速转变为碳酸盐环境的过程。

An unusually high level of iridium appears at this time in the geologic ''.

在这一时期的地质''。

The trip visits Spurn Point, Holderness, Scarborough, Sewerby and Filey Brigg. Topics discussed include: erosion; the effect of geology on urban development; paleocliffs; Jurassic reefs; chalk cliffs and jet rock.

网站还提供了一些主题讨论，主题涉及到海水侵蚀、地质变化对城市发展的影响、侏罗纪时期暗礁介绍、白垩纪时期悬崖介绍及黑玉岩介绍等内容。

According to existing results, it is generally thought that during the Neoproterozoic Earth had experienced several most severe global glaciations in Earth's history.

根据现有的研究结果，地球在新元古代时期确实经历了数次地球历史上最为严重的全球性冰川期，但地球是否被完全冰封还需要更充分的古地质和古生物方面的证据来证明；利用气候模式对各种可能的外部强迫的模拟试验表明&冰雪地球&是很难形成的，并且，如果地球进入完全被冰封的状态，它将是难以被融化的；关于新元古代时期剧烈的气候变化对寒武纪生命大爆发所起的作用存在2种观点，一种认为气候变化导致了原始生命的基因突变并诱发了寒武纪生命爆发，另一种认为这种影响主要是生态方面的。

"The interval encompassing the Vendian to Cambrian is perhaps the most enduring enigma in historical geology"(Hoffman, 1991). It is current viewpoint that the important transmutation of paleaocoenosis, palaeogeography and paleaostructure relates to the breakup of Rodinia supercontinent at this phase.

&文德期-寒武纪转折时期也许是地质历史中最恒久的谜&(Hoffman，1991)，目前认为，这一时期古生物、古地理、古构造的重大质变与Rodinia超大陆的裂解有关。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。