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1)  weathering crust of Ordovician top
奥陶系顶面风化壳
2)  Ordovician weathered crust
奥陶系风化壳
1.
Migration characteristics of Ordovician weathered crust natural gas in central Eerduosi Basin;
鄂尔多斯盆地中部奥陶系风化壳天然气的运移特征
2.
Analysis of the natural gas accumulation in the Ordovician weathered crust of the central gasfield in Ordos Basin;
鄂尔多斯盆地中部气田奥陶系风化壳天然气成藏分析
3.
Gas sources of Ordovician weathered crust gas reservoirs in Central Gas Field in the Ordos basin are an important problem that has not been c ompletely solved.
鄂尔多斯盆地中部气田奥陶系风化壳天然气藏的气源问题是迄今尚有争议的重要问题。
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3)  top ordovician
奥陶系顶面
4)  Ordovician top
奥陶系顶部
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5)  Ordovician erosion surface
奥陶系侵蚀面
1.
The gas field having been found in Ordovician palaeocrust of Ordos Basin is large ancient landform gas accumulations and its gas containing area is closely related to distributive configuration of ancient valley trough on Ordovician erosion surface.
其含气面积与奥陶系侵蚀面古沟槽展布密切相关。
6)  cuirasse
红土剖面顶部的铁质风化壳
补充资料：风化
分子式：
CAS号：

性质： 当空气中的水蒸气分压低于水合盐的离解压力时，水合盐失去水，它的表面被一层低水合物或无水盐覆盖的现象。如Na2CO3·10H2O及Na2SO4·10H2O。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条