shale rock

There are mutual samdwich rock of Cambrian limestone and shale in Pan-shi reservoir's to piloting water tunnel and flooding water tunnel, In which the shale is decisive to the tunnel stability.

盘石水库泄洪洞、导流洞所涉及的岩体为寒武系下统灰、页岩互层层状岩体。其中页岩对洞室的稳定起决定作用。

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A metamorphic rock intermediate between shale and slate , that does not possess true slaty cleavage.

一种细颗粒的变质岩,由泥质岩受热形成.

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Field observations and analysis indicate that the main materials of the waste rock dump are the host rock Middle Ordovician black shale and primary carbonate manganese ore.

野外观察及分析结果表明：组成废矿堆的岩石主要是赋矿围岩中奥陶统黑色页岩和原生碳酸锰矿石。

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The petrological-chemical analysis of clastic sedimentary rocks from Quantou Formation, Cretaceous indicates that their lithology mainly consists of arkose, shale and minor rock debris sandstone and greywacke by chemical classification of bulk elements.

通过对白垩系泉头组碎屑沉积岩岩石样品的岩石化学分析表明：主元素化学分类结果主要为长石砂岩、页岩，少量岩屑砂岩和硬砂岩；

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But engineering advances have led to a boom in extracting previously unobtainable gas locked in shale rock, of which the US has lots.

但随着工程技术的进步，储藏在页岩层中、以前无法利用的天然气如今已经可以大规模开采，而美国有很多这样的页岩层。

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According to the nature, Guangxi Limestone is separated into three types: pure limestone, siliceous limestone, mixed sand shale or limestone of igneous rock.

广西的石灰岩按性质可分为纯质石灰岩、夹硅质石灰岩、夹砂页岩或火成岩的石灰岩三种类型。

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