| 单词 | obolite grit |
| 释义 | > as lemmasobolite grit Only in obolite grit, a sandstone formation containing fossil brachiopods of the genus Obolus. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > primary or Palaeozoic > Silurian > specific grauwacke1794 greywacke1805 Wenlock formation1834 Trenton1854 obolite grit1859 Salina1863 Downtonian1900 1859 R. Owen in Encycl. Brit. XVII. 105/1 Obolus, Eichw. (= Ungula, Pander) is so abundant in the lower Silurian sandstones of Sweden and Russia as to have given its name to the ‘obolite grit’. < as lemmas |
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