一种纹理清晰的变质岩，由石英、长石、云母和其他矿物组成，因侵入岩对沉积岩，特别是页岩的作用而形成。
A fine-grained metamorphic rock composed of quartz, feldspar, mica, and other minerals, formed by the action of intrusive rock upon sedimentary rock, especially shale.
临桂县矿产资源的开发利用主要是以灰岩为主，重晶石、粘土、页岩、石英岩等为辅。
The development and utilization of mineral resources in Lingui county give priority to limestone, while barite, clay, shale, quartzite as subsidiary.
藏南定日地区在白垩纪中期发育一套浅灰色深灰色的以钙质页岩、泥灰岩及微晶灰岩为主的浅海陆棚相沉积，岩石中除含较高的粘土矿物及陆源石英矿物颗粒以外，还含有十分丰富的有孔虫化石。
The Middle Cretaceous shallow sea sediments, represented by a series of light dark gray marine clastic and carbonate rocks, were well exposed along the Gongzha Section in Tingri, southern Tibet.
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