Jurassic

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

这是次在我国发现靠陷胸茎蜂化石，也是该亚科在次报道。

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

含煤地层为中下统江仓组,成煤环境属中生代断陷盆地内河湖、沼泽相沉积。

3.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，成藏期在到早白垩世。

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

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。

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

西北地区煤系地层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。