Shale页岩
Shale is a sedimentary rock in the class known as detrital sedimentary rocks. It consists of silt- and clay-sized particles and accounts for well over half of all sedimentary rocks. The tiny particle sizes make the granular structure difficult to see with the naked eye, but microscopic examination of the nature and size of the grains gives information about the formation process. 页岩是一种称为碎屑沉积岩的岩石类型。它由砂和黏土颗粒组成，占所有沉积岩的大部分。由于颗粒非常细小，其颗粒结构肉眼难以观察到，但通过显微镜观察颗粒的性质和大小可以了解其形成过程。
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Index Reference Lutgens and Tarbuck Ch 6 索引 参考 Lutgens 和 Tarbuck 第6章 | ||
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Mudstone泥岩
The term mudstone is used for sedimentary rock in the class known as detrital sedimentary rocks. Like shale, it consists of tiny particles which make the granular structure difficult to see with the naked eye. It tends to break up into clumps or blocks. Mudstones are found in the Chinle Formation above the Grand Canyon, and the low, rounded hills of Arizona's Painted Desert and Petrified Forest National Park. 泥岩一词用于指属于碎屑沉积岩类的沉积岩。如同页岩一样，它由细小的颗粒组成，使得颗粒结构在肉眼难以辨认。泥岩倾向于破碎成块或小块。泥岩可以在大峡谷上方的奇勒组中找到，也在亚利桑那州的彩虹沙漠和化石森林国家公园的低矮、圆顶状的丘陵中发现。
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Index Reference Lutgens and Tarbuck Ch 6 索引 参考 Lutgens 和 Tarbuck 第6章 | ||
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