Jurassic

This is the first reliable trematothoracin sawfly discovered in China and in the Jurassic Period.

这是首次在我国发现可靠的陷胸茎蜂，是该亚科在侏罗纪的首次道。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统,成煤环境属中生代断陷盆地内河湖、沼泽相沉积。

The third period is the Jiamuhe group overmature dry gas in the late Jurassic Period to the early Cretaceous.

第三期是佳木河过成熟干气，成藏期在侏罗纪到早白垩世。

Photo Gallery: Jurassic Period Domelike mogotes in Valle de Vi?ales National Park, Cuba, emerge from a blanket of fog.

侏罗纪时代图片集。穹顶状的mogotes在Valle de vi?ales国家公园，古巴，显示毯子的雾。

Main macerals of hydrocarbon generation are sporinite, cutinite, alginite, bituminite, liptodetrinite and desmocollnite in source rocks from Jurassic coal measure in Northwest China.

西北地区侏罗纪煤系地层中主要的生烃显微分是孢子体、角质体、藻类体、沥青质体、碎屑类脂体、基质镜质体等，而树脂体、木栓质体等早期低熟生油分含量很低。

Nonmarine sequence stratigraphy is used to analyze Jurassic depositional sequences in Tu-ha basin, and three sequences and one supersequence are divided in this paper.

本文应用陆相层序地层学方法对吐哈盆地侏罗系沉积层序进行了综合分析，划分出三套层序和一套超层序。

The basin tectonic model: it is intermont basin during late Jurassic to early Cretaceous, developed into faulted-lacustrine basin in Eogene, and evolved into depression in Neogene and Quaternary.

“盆地”构造发育模式为：从晚侏罗世到白垩纪末期发育的山间“盆地”开始、发展到早第三纪断陷湖盆的发育、再演为晚第三纪及第四纪地陷发育阶段。