In form Algonkian. Geology. With the: the Proterozoic eon or the rocks collectively dating from this time, esp. in North America. Cf. sense B. 2…
| 单词 | θ5450 |
| 释义 | the world > the earth > structure of the earth > age or period > [noun] > Pre-Cambrian > Proterozoic (5) Algonquian1890 In form Algonkian. Geology. With the: the Proterozoic eon or the rocks collectively dating from this time, esp. in North America. Cf. sense B. 2… Proterozoic1893 Frequently with the. The Proterozoic eon; the system of rocks dating from this time. Subcategories:— specific (2) — specific rocks (1) |
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