上白垩统 meaning in Chinese
chalk
upper cretaceous series
uppercretaceousseries
Examples
- Upper cretaceous rudist bioherms in southwestern tarim
塔里木盆地西南地区上白垩统生物丘 - The types and characteristics of the sedimentary facies developed in pukou formation of upper cretaceous in huaiyin sag of yanfu depression are analyzed
摘要对盐阜坳陷淮阴凹陷上白垩统浦口组发育的沉积相类型及其特征进行了分析。 - The upper cretaceous and paleogene are of continental sediments in henan province , and the boundary between them considered to be unconformable or disconformable because of the very difference in sedimentation and biological assemblages
摘要河南省上白垩统与古近系均为陆相沉积，在全省范围内，两者间呈假整合或不整合接触，在沉积特征上显示出较大的差异，在古生物群的演化方面，也各自具有不同的特色。 - The upper cretaceous jingzhushan formation in the biru basin , xizang consists of a succession of coarse - grained elastic rocks in the alluvial fan - fan delta depositional system , intercalated with intermediate - acidic volcanic rocks including dacite , andesite , quartz trachyandesite and rhyolite
摘要上白垩统竞柱山组为一套冲积扇扇三角洲沉积体系的粗碎屑岩，间夹由英安岩、安山岩、石英粗安岩和流纹岩组成的中酸性火山岩。 - The analyses of the sedimentary facies , rock geochemistry and reformation after the sedimentation from the upper cretaceous quantou formation to nenjiang formation indicate that the beneficial sand - bodies of the uranium deposit are mainly quantou formation ' s braided channel and qingshankou formation ' s delta sandstone types
摘要从上白垩统泉头组嫩江组沉积相展布、岩石地球化学及沉积期后改造作用分析入手，阐明了研究区有利铀成矿砂体主要为泉头组的辫状河与青山口组的三角洲砂体。