The sediments are rich in clay, which forms when water weathers rocks into fine-grained particles.
这些沉积物富含粘土，粘土是由水流将岩石侵蚀成细小的微粒所形成的。
The Neogene strata in Longchuan basin consist mainly of the fine grained clastic rocks containing abundant sporopollen fossils.
陇川盆地新第三纪地层主要由细粒碎屑岩组成，富含孢粉化石。
The types of mineralized rocks are fine grained biotite gneiss and silicalites.
矿化类型为含金黑云变粒岩型、含金硅质岩型。
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