侃侃而谈 (形容说话理直气壮,从容不迫) with fervour and assurance; pour out words; talk with confidence and composure; talk with ease and fluency [sincerity]; speak freely and frankly; speak boldly
It is concluded that the thrust structure formed in late - jurassic . faults with high angles appeared in hengshanbu structure part which is also developed in late - jurassic deduced by strata contact relationship . middle district includes two parts which 横山堡构造带发育由东向西逆冲的高角度断裂,根据地层接触关系,推断该构造带的逆冲活动发生于晚侏罗世。
The result shows that a sequence boundary is identified inside member 2 of sangonghe formation of lower jurassic , which is characterized by lithology of scour surface and conglomerate and gravel bearing gritstone over it , and by well logs of abrupt contact 通过岩心、录井、测井、地震的综合研究发现,在下侏罗统三工河组二段内部可以识别出一个三级层序界面。
The andesite clasts were most likely derived from erosion of igneous rock in middle jurassic time , and the limestone clasts were derived from cambrian and ordovician strata . dolomite clasts were derived from the middle proterozoic jixian group 安山岩砾石是中侏罗统髫髻山组火山岩剥蚀的产物,灰岩砾石来自于寒武、奥陶系灰岩,白云岩砾石主要来自于蓟县系白云岩。
Abstract : based on the isotopic dating data of volcanics and recent research achievements of age boundary between jurassic and cretaceous systems , it is suggested that the volcanic series in shengyuan basin must be attributed to lower cretaceous 文摘:本文根据盛源盆地火山岩同位素年龄数据和侏罗-白垩系界线年龄的最新研究成果,认为盛源盆地火山岩系的地层时代应属早白垩世。
It was mainly river sedimentary system in early jurassic period , lake sedimentary system and delta sedimentary system in middle - later jurassic period and there are fan delta sedimentary system and alluvial fan sedimentary system in the edge of basin 早侏罗世以河流沉积为主,中晚侏罗世整个盆地以湖泊沉积体系和三角洲沉积体系,边缘区出现扇三角洲沉积体系和冲积扇沉积体系。
The tuchengzi formation mainly consists of carbonate ( limestone and dolomite ) clast conglomerate characterized by poorly sorted and poorly rounded clasts , which shows that the deposition of the tuchengzi formation is closely associated with late jurassic tectonism 砾岩的成分和结构成熟度都表明它的形成与剧烈的构造活动紧密相关,是研究区内晚侏罗世时期强烈构造变动的沉积记录。