英德
有道
百度
谷歌
图片
维基
百科
元古代 [yuán gǔ dài]
Proterozoic era
- 铀矿勘查是在北部的阿纳姆地始元古代沉积变质的厚砂岩盖层下面寻找与不整合面有关的矿床。
Uranium exploration for unconformity-related deposits in Palaeoproterozoic metasediments was carried out below a thick cover of Kombolgie Sandstone at Arnhen Land, Northern Territory. - 燕山超基性岩带位于华北地台北缘，形成于中、晚元古代，属阿拉斯加型环带状镁质—铁质超基性岩。
Yanshan ultrabasic rock belt, which were formed at Middle-Late Proterozoic period, locates in the north margin of the North China Platform consisting of Alaska concentric Zoned type rock bodies. - 辽东地区早元古代大石桥组赋存有富镁质的碳酸盐岩建造，其中产有大型或超大型菱镁矿、滑石矿床。
A number of large and super large magnesite and talc deposits occur in Mg_rich carbonate strata of Early Proterozoic Dashiqiao Formation in eastern Liaoning Province.
 |
 |
 |
 |
 |
 |
 |
中国词汇量第二的英语词典
更多精彩，登录后发现......
