top stratum meaning in English
地表岩层
顶层
Examples
- Most of this area was shallow - lake , semi - deep lake and deep lake sedimentary environment , except that the area around the well ou44 was a set of steep - slope fan - delta and the dawan area was a set of small - scale fan - delta . there were fan - delta , turbidite - fan , shallow - lake , shore - marsh , semideep - lake and volcano - debris facies . in the area of the well ou39 and ou44 , fan - deltas developed both in the middle and the top strata of the third member of the shahejie formation
研究表明，粗面岩sio _ 2含量较高，流动性小，容易形成巨厚的岩钟或岩锥，对成藏有利，同时其位于构造高部位，由于其大部在水面之上，冷却时间长，易于从容结晶，同时还有大量裂缝作为储集和渗滤的空间，使其成为良好的储层。 - There were fan - delta , turbidite - fan , shallow - lake , shore - marsh , semideep - lake and volcano - debris facies . in the area of the well ou39 and ou44 , fan - deltas developed both in the middle and the top strata of the third member of the shahejie formation . the former lies in the north area of the well ou39 , belonging to the steep - slope style which was controled by inertia factor
在欧39 、欧44井区，沙三中和沙三上均发育扇三角洲沉积，前者具以惯性因素控制的陡坡型为特点，分布范围相对较小，位于欧39井以北的地区；而后者以摩擦因素控制的缓坡型为特色，分布范围广；而沙三下在该区则发育了一套浊积扇体，这一规律正好体现了构造演化特点对沉积充填型式及相展布的控制作用。