chert

1. Paleontologists know chert as a good place to look for fossils.: 古生物学家以黑硅石为化石采集地点的标志。

2. Thus we can better understand the deformation of chert in a highly fluid form.: 这样我们就能更好地理解燧石在高度流体状态时的变形情况。

3. Chert with good abrasion the major content in conglomerate and diamonds are contained in it generally.: 砾岩主要砾石成分为燧石，磨圆度较好，普遍含金刚石。

4. The thin-beded siliceous -rocks include chert and depositional quartz with textures of oolite and pebble.: 矽质岩包括燧石和沈积石英岩，呈薄层状产出，沈积石英岩具鲕状、砾状结构。

5. Chert with good abrasion is the major content in conglomerate, and diamonds are contained in it generally.: 砾岩主要砾石成分为燧石，磨圆度较好，普遍含金刚石。

6. The sedimentary environment of the chert reflects the tectonic setting of the small oceanic basin in Late Jurassic.: 硅质岩的形成环境反映了该陆缘小洋盆在晚侏罗世所处的构造背景。

7. In limestone of Taiyuan Group, Origin of nodular chert and banded chert is that they had been replaced in diagenesis phase.: 太原群灰岩中的燧石结核或条带是在成岩作用阶段经硅质交代成因的。

8. There exists abundant radiolaria in the chert, and the radiolarian association suggests that the chert was formed in the last period of Late Jurassic.: 硅质岩中含有大量放射虫，放射虫组合显示硅质岩的沉积时代为晚侏罗世晚期。

9. Molecular paleontology in thermal chert in Laerma gold deposit shows that the organic precursors intimately associated with gold are marine bacteria and algae.: 通过对拉尔玛金矿热水成因硅质岩中分子古生物学的研究，指出硅质岩中与金关系密切的生物母源为海生低等菌藻生物。

10. If chert does not contain impurities and the age spectrum is very precise, the minimum apparent age in middle temperature may have geochronological implication.: 当燧石纯度很高，加热阶段划分得很细时，马鞍形谱线中温区间最小视年龄具有某种年代学意义。

11. Microscopic studies of the kerogen from the chert samples show that the main components of the kerogen are organic fragments and microsome with weak anisotropy.: 油浸显微镜下鉴定硅岩中的干酪根组成多为有机质碎片和微粒体，并显示微弱的各向异性。

12. A shallow water smaller foraminifera fauna is studied from limestone intercalations of the upper Permian chert from Liuqiao area, Guangxi Zhuang Autonomous Region, China.: 本文研究了广西扶绥县柳桥地区二叠纪末期的浅水相小有孔虫动物群。

13. The uranium deposit of Silurian age in a certain area is controlled mainly by fracture and morphologically changing parts of uranium bearing siliceous limestone and chert beds.: 某地区志留系中的铀矿床，主要受硅灰岩和硅岩含矿层形态变异部位和断裂构造控制。

14. The bulk of the artifacts from Liang Bua are simple flake tools struck from volcanic rock and chert, no more advanced than the implements made by late australopithecines and early Homo.: 梁布亚出土的石器，大部份是以火山岩与燧石打制的简单石片器，并不比晚期南猿人与早期人属物种制作的石器先进。

15. The bulk of the artifacts from Liang Bua are simple flake tools struck from volcanic rock and chert, no more advanced than the implements made by late australopithecines and early Homo.: 梁布亚出土的石器，大部份是以火山岩与燧石打制的简单石片器，并不比晚期南猿人与早期人属物种制作的石器先进。

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