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陷胸茎蜂化石，也是该亚科在侏首次道。

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

含为中下侏统江仓组,成环境属中生代断陷盆内河湖、沼泽相沉积。

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

第三期是佳木河组过成熟干气，成藏期在侏到早白垩世。

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

侏时代图片集。穹顶状mogotes在Valle de vi?ales国家公园，古巴，显示毯子雾。

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

西北区侏系中主要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、木栓质体等早期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.

本文应用陆相序学方法对吐哈盆侏系沉积序进行了综合分析，划分出三套序和一套超序。

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”构造发育模式为：从晚侏世到白垩末期发育山间“盆”开始、发展到早第三断陷湖盆发育、再演化为晚第三及第四陷发育阶段。