Jurassic

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

这是首次我国发现可靠的陷胸茎蜂化石，也是该亚科罗纪的首次道。

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

含煤地层为下罗统江仓组,成煤环境属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.

第三是佳木河组过成熟干气，成藏罗纪到早白垩世。

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

罗纪时代图片集。穹顶状的mogotesValle 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.

西北地区罗纪煤系地层主要的生烃显微组分是孢子体、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、木栓质体等早低熟生油组分含量很低。

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：从晚罗世到白垩纪末发育的山间“盆地”开始、发展到早第三纪断陷湖盆的发育、再演化为晚第三纪及第四纪地陷发育阶段。