Septarium

[sep'teәriәm]

解释:

(n.) A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals.

编辑:朱利叶斯

解释:

n. an ovate flattened nodule of argillaceous limestone or ironstone—turtle-stone:—pl. Septā′ria.—adj. Septā′rian.

录入:莱斯特