英德
有道
百度
谷歌
图片
维基
百科
下奥陶统
lower /early ordovician
- 在湖北宜昌下奥陶统红花园组生物礁中发现并采集到轻质油苗。
The oil seepages relative to organic reefs in Yichang, Hubei province were discovered and collected. - 这一成果对于贵州北部下奥陶统的研究，提供了微体化石资料。
This achievement provides the microfossil materials for the study of the lower ordovician in Northern Guizhou. - 塔中围斜区主要分布有上泥盆统东河砂岩、志留系碎屑岩储层，以及中、下奥陶统碳酸盐岩储层。
The clastic rock reservoirs of Upper Devonian and Silurian and the carbonate reservoirs of Middle and Lower Ordovician are mainly distributed in the pen- dine area around central Tarim basin.
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