... chalky clay 白垩黏土 chalk marl 白垩泥灰岩 chalk 白垩 ...
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泥灰白垩岩 marlaceous chalk
·2,447,543篇论文数据，部分数据来源于NoteExpress
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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