ordovician

Cambrian - Ordovician petroleum system is the most important system type in the northern region of Tarim basin.

寒武系 — 奥陶系源岩含油气系统是塔北地区最重要的一类已知含油气系统.

Among the multi - oil - generating beds, the Cambrian and Ordovician is the best one.

特别是在盆地内发现的多套生油层系中, 寒武──奥陶系为最佳.

The Cambrian - Ordovician strata in Luxi Block are very continuous and well exposed.

鲁西地块的寒武 - 奥陶纪地层出露连续,露头较好.

A rift trough along Mianxian - Lueyang ophiolitic melange belt was formed from Ordovician to Silurian.

奥陶纪—志留纪大致沿勉略构造带形成南秦岭裂陷槽.

There is abundant karst fissure water in the limestone and dolomite of Cambrian and Ordovician.

寒武系、奥陶系地层主要为灰岩和白云岩,其间赋存有较丰富的岩溶裂隙水.

The Ordovician lithofacies and biofacies change greatly at different localities of the Yangtze Region, South China.

华南扬子区不同地点奥陶纪的岩相 、 生物相变化显著.

The main water source is fracture - karst water in Middle Ordovician carbonate rocks.

主要的供水水源为中奥陶统碳酸盐类岩石中的裂隙 - 喀斯特水.

The Lower Ordovician in Tazhong area is dominated by marine carbonate.

塔里木盆地塔中地区下奥陶统主要为一套海相碳酸盐岩.

The Cambrian and Ordovician are important exploration target strata in Leshan - Longnvsi paleo - uplift area.

寒武系和奥陶系是四川盆地乐山 — 龙女寺古隆起区的重要勘探目的层系.

The main reservoir types in Ordovician carbonate formation in Tahe Oilfield are dissolution fractures and caves.

塔河油田奥陶系碳酸盐岩地层的主要储集空间为溶蚀缝、洞.

NOTES ON THE GENUS REEDOCALYMENE KOBAYASHI, 1951 ( TRILOBITA, ORDOVICIAN )

论奥陶纪三叶虫属ReedocalymeneKobayashi, 1951 ( 英文 )

Study shows that the Ordovician carbonate formation in this area characteristic of very low groundmass porosity.

明确了研究区奥陶系储层为超低基质孔的致密碳酸盐岩,岩溶作用为本区储层发育的主控因素.

The Tahe reservoir Ordovician carbonate rock belongs to the type reservoir that this is special.

塔河油田奥陶系碳酸盐岩属于该特殊类型油藏.

Marine volcanics of Early Ordovician was found in Zhifang region.

摘要纸房地区具有早奥陶世海相火山岩存在.

This was the result from the large - scale regression in the Late Ordovician.

这是晚奥陶世晚期大规模海退的结果.