“coral-rag”的英英意思

单词 coral-rag
释义 coral-rag Geol.
[f. coral + rag in its local sense of hard coarse-textured rock.]
The upper member of the Middle Oolite series, a kind of limestone, containing continuous beds of petrified corals.
1816W. Smith Strata Ident. 19 The Coral Rag consists chiefly of lumps of coralline Limestone.1878Huxley Physiogr. xvii. 274 The coral-rag itself is altogether similar to the coral-limestone.

 

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