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.
太原群灰岩中的燧石结核或条带是在成岩作用阶段经硅质交代成因的。 - 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.
燧石结核是华南地区二叠纪栖霞组的重要识别特征之一，其成因具重要的古地理、古海洋意义。
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