1) 4th order sequence
四级层序
1.
Then,controlled by the flooding surface of 4th order sequence,eight vertical flow zones were distinguished in the southern a.
以层序地层划分为基础,把崖13-1气田主力产层陵三段划分为8个四级层序,并以四级层序的海泛面为控制边界,在气田南区与北II区划分出8个垂向流动单元,而在北I区划分为7个垂向流动单元。
2) Third and Fourth Order Stratigraphic Cycles
三.四级地层层序
3) fourth-order sequence division
四级层序划分
4) meter-scale cyclic sequence
米级旋四层序
1.
The basic stratigraphic units-meter-scale cyclic sequences and their types have beendistinguished in the Middle Cambrian oolitic shoal carbonate sequences in North China.
这些米级旋四层序在塞向上叠加构成高级（五级、四级、三级）旋回层序时表现出周期性和规律性。
5) 4th order sequence framework
四级层序格架
6) four-stage course
四级程序
补充资料：四序
1.指春﹑夏﹑秋﹑冬四季。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条