| 单词 | turtle-stone |
| 释义 | > as lemmasturtle-stone turtle-stone n. = septarium n. (from the markings on section resembling those of a tortoiseshell). ΘΚΠ the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > concretionary or nodular > septarium septarium1748 turtle-stone1851 beetle-stone1859 cement-stone1863 1851 H. T. De la Beche Geol. Observer 687 Those commonly known as septaria and turtle stones. 1859 R. Hunt Guide Mus. Pract. Geol. (ed. 2) 32 Good specimens of septaria or turtle stone from the Oxford clay. < as lemmas |
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