Silurian period 志留纪
middle Silurian 中志留纪 ; 中志留世
Silurian system 志留系
Late Silurian Epoch 晚志留世
Lower Silurian 早志留世 ; 下志留统
mid-late silurian 中晚志留世
The Silurian was mainly medium sand, fine sand, siltstone and pelitic siltstone in shallow sea.
志留系沉积以滨浅海的中细砂岩、粉砂岩及泥质粉砂岩为主。
参考来源 - 塔里木盆地东北地区下古生界层序格架与沉积相研究Acidizing treatments in TaZhong(TZ)12 Silurian sandstone formation had achieved little effect and should be improved for inadequate understanding on the damage and inappropriate acid system.
塔中(TZ)12油田志留系砂岩储层在以往酸化改造现场实践中，由于对储层伤害认识不够深入，酸液类型和配方针对性不强，酸化有效率和增产率有待进一步提高。
参考来源 - 塔中12志留系砂岩储层酸化技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： Silurian period
以上来源于: WordNet
ADJ of, denoting, or formed in the third period of the Palaeozoic era, between the Ordovician and Devonian periods, which lasted for 25 million years, during which fishes first appeared 志留纪的; 奥陶纪与泥盆纪之间，持续了2500万年，此间首次出现鱼类
N the Silurian period or rock system 志留纪
The contact relationship between Silurian and Devonian is parallel unconformity.
泥盆系与志留系之间为平行不整合接触。
Porphyry mineralization, occurred in the Silurian Period, finally formed ore bodies.
晚期矿化发生于志留纪，使矿床最终形成。
Unless the upper part of Ningqiang Formation maybe belongs to Middle Silurian, the others belong to lower Silurian.
本区绝大部分地层为下志留统，只有宁强组上部可能为中志留统。
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