| 单词 | Upper Carboniferous |
| 释义 | Upper Carboniferous (once / 437753 pages) n WORD FAMILY Upper Carboniferous USAGE EXAMPLESFrom the Upper Carboniferous onward, however, no marine deposits are known; and, as in Siberia, plant bearing beds are met with. Various, Encyclopaedia Britannica, 11th Edit...(2010) The Coal-Measures and Millstone Grit are usually grouped together in the Upper Carboniferous, the Carboniferous Limestone series constituting the Lower Carboniferous. Various, Encyclopaedia Britannica, 11th Edit...(2010) Cinto; but between the Gulfs of Porto and Galeria, schists, limestones and anthracite, containing fossils of Upper Carboniferous age, occur. Various, Encyclopaedia Britannica, 11th Edit...(2010) n from 310 million to 280 million years ago; warm climate; swampy land Syn|Exp Pennsylvanian, Pennsylvanian period, Upper Carboniferous period geological period, period a unit of geological time during which a system of rocks formed |
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