志留系是一个地质时期和系统志留系（Silurian System）是志留纪时期形成的地层。志留系在波罗的海的哥特兰岛发育较好，故曾称哥特兰系（Gotlandian System）。
n. siluric
misc. silurian system
关键词: 北祁连；志留系；层序地层学特征 [gap=7352]Keywords: Northern Qilianshan, Silurian System, Sequence stratigraphic characters
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泥盆系与志留系之间为平行不整合接触。
The contact relationship between Silurian and Devonian is parallel unconformity.
滨海区的志留系，已成为兴凯地体陆缘增生带的组成部分。
TheSilurian on the littoral area has been a part of the Xingkai terrain epicontinental aggradation-al belt.
志留系捕集油气经历了油气聚集-破坏-再聚集的复杂过程。
The entrapment of hydrocarbons by the Siluriansandstones experienced a complicated process of accumulation, destruction and reaccumulation.
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