• 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,圆度较普遍金刚石

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  • The thin-beded siliceous -rocks include chert and depositional quartz with textures of oolite and pebble.

    矽质岩包括燧石沈积石英岩,呈薄层状产出,沈积石英岩具状、结构

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  • 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,圆度较普遍金刚石

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  • The sedimentary environment of the chert reflects the tectonic setting of the small oceanic basin in Late Jurassic.

    硅质岩形成环境反映了陆缘小洋侏罗世所处构造背景

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  • In limestone of Taiyuan Group, Origin of nodular chert and banded chert is that they had been replaced in diagenesis phase.

    太原灰岩中的燧石结核或条带成岩作用阶段经硅质交代成因

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  • 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。

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  • The Rhynie Chert is one of the most important fossil plant occurrences because it represents the oldest and most completely preserved terrestrial ecosystem.

    碎石作为重要植物化石产出,其关键在于代表了最古老、最完整保存的陆地生态系统。

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  • Molecular paleontology in thermal chert in Laerma gold deposit shows that the organic precursors intimately associated with gold are marine bacteria and algae.

    通过拉尔玛金矿热水成因硅质岩分子古生物学的研究,指出硅质岩中关系密切的生物母源为海生低等生物。

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  • 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组成多为有机质碎片微粒体,并显示微弱各向异性

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  • If chert does not contain impurities and the age spectrum is very precise, the minimum apparent age in middle temperature may have geochronological implication.

    燧石纯度很高,加热阶段划分得时,马鞍形线区间小视年龄具有某种年代学意义。

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  • A shallow water smaller foraminifera fauna is studied from limestone intercalations of the upper Permian chert from Liuqiao area, Guangxi Zhuang Autonomous Region, China.

    本文研究广西扶绥县柳桥地区二叠纪末期浅水有孔虫动物群

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  • 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.

    地区志留系中的铀矿床主要灰岩硅岩含矿层形态变异部位断裂构造控制。

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  • 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.

    出土石器,大部份是以火山岩燧石打制简单石片器,并不晚期南猿人早期属物种制作的石器先进

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  • 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.

    出土石器,大部份是以火山岩燧石打制简单石片器,并不晚期南猿人早期属物种制作的石器先进

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