nodular chert
常见例句
- In limestone of Taiyuan Group, Origin of nodular chert and banded chert is that they had been replaced in diagenesis phase.
太原群灰巖中的燧石結核或條帶是在成巖作用堦段經矽質交代成因的。 - The Middle Permian Chihsia Formation of South China is featured by nodular chert, which is of implications in the reconstruction of coeval paleogeography and paleoceanography.
燧石結核是華南地區二曡紀棲霞組的重要識別特征之一，其成因具重要的古地理、古海洋意義。
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