次层 meaning in English

sublayer
sublevel
subshell
substratum

Expand one level
展开次层子目录
The kalshayi formation in the tazhong 401 borehole with distinct lithologic members , developed organisms , and precise stratigraphic age , is well developed organisms , and precise stratigraphic age , is well developed , and is designated as the hypostratotype of the kalashayi formation
塔中401卡拉沙依组发育全，岩性段划分清楚，生物发育，地层时代确定，被指定为卡拉沙依组次层型。
Based on well logs , three - dimension seismic profiles , cores and other basic data , author recognized the sequence horizons of high - scale by the changes of a / s ratio , and established high - resolution chronostratigraphic framework using multi - term base - level cycles of high - resolution sequence stratigraphy , combining sequence theory with sedimentology . the depositional system characters and distribution were outlined and the prospective areas for stratigraphic traps were defined : jishan and jiangjiadian
本文是以钻井、地震资料、岩心和各种分析化验资料为基础，以多级次基准面旋回为参照面的高分辨率层序地层学理论与研究方法将层序地层分析技术与沉积学原理紧密结合起来，运用a / s比值的变化趋势可以识别高级次层序界面，建立高分辨率层序地层对比格架。