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纸房地区具有早奥陶世海相火山岩存在。Marine volcanics of Early Ordovician was found in Zhifang region.

华南下、中奥陶统紫台组命名地点在贵州印江紫台。The Lower to Middle Ordovician Zitai Formation is named by Mu et al.

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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 Lower Ordovician in Tazhong area is dominated by marine carbonate.

这是晚奥陶世晚期大规模海退的结果。This was the result from the large-scale regression in the Late Ordovician.

奥陶系排油气损失最严重，其次为寒武系。Vertically, oil-gas loss in Ordovician is the biggest, followed by Cambrian.

岛弧深成岩成分变化较大，由闪长岩变化到花岗岩，成岩时代为奥陶纪。Island-arc pluton consists of diorite to granite, which formed in Ordovician.

首次发现轮南地区奥陶纪生物礁。Ordovician organic reefs were first discovered in the Lunnan area, northern Tarim.

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

奥陶纪时期，塔中地区发育生物礁、丘和滩等不同类型的碳酸盐岩建隆。Reefs, mounds and shoals are widely developed in the Ordovician in central Tarim basin.

塔河油田奥陶系碳酸盐岩储层非均质性和各向异性强，储集层类型复杂。Ordovician carbonate reservoir is strong anisotropic and very complicate in Tahe Oilfield.

华北地区奥陶系厚度大，富水性强。In north China, the thickness of Ordovician system is larger, the water-abundance is better.

塔里木轮古西地区奥陶系灰岩是古岩溶发育的有利场所。Paleo-karst was developed in Ordovician limestones at the west of Lungu area in Tarim basin.

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奥陶系以发育潮坪相为特征，并有少量浅海沉积。The Ordovician system is characterized by the tidal flat facies with a few shallow sea facies.

塔河油田奥陶系碳酸盐岩经历了多期构造运动的改造。Ordovician carbonates of Tahe oilfield have been reformed by tectonic movements for many times.

寒武系、奥陶系地层主要为灰岩和白云岩，其问赋存有较丰富的岩溶裂隙水。There is abundant karst fissure water in the limestone and dolomite of Cambrian and Ordovician.

塔河油田奥陶系碳酸盐岩属于该特殊类型油藏。The Tahe reservoir Ordovician carbonate rock belongs to the type reservoir that this is special.

这种定量的岩相古地理图在我国南方中及晚奥陶世还是首次出现。This is the first time in the study and mapping of the Middle and Late Ordovician in South China.

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鄂尔多斯盆地在奥陶系顶部发育大面积的风化壳岩溶储层。There developed a vast area of weathering crust karst reservoirs on top Ordovician in Ordos Basin.

奥陶纪—志留纪大致沿勉略构造带形成南秦岭裂陷槽。A rift trough along Mianxian -Lueyang ophiolitic melange belt was formed from Ordovician to Silurian.

这表明早奥陶世的海进比寒武纪的更甚了。It means that the transgression in the Early Ordovician was more extensive than that in the Cambrian.